Alex Oxlade-Chamberlain is likely to miss the whole of the forthcoming season.
The 24-year-old sustained what has been described as multiple ligament damage in a tackle and underwent successful surgery eight days later.
He will not need to go under the knife again but faces a long rehabilitation programme before he will be able to return to competitive action.
A statement from Liverpool read: “The estimated length of his lay-off was not revealed at the time at the request of Oxlade-Chamberlain, who did not want the news to distract from the Reds’ ongoing Champions League run and the excitement surrounding it.”
The news will come as a huge blow and a shock to Liverpool fans, with Oxlade-Chamberlain among their star performers during the latter stages of last season.
Manager Jurgen Klopp told liverpoolfc.com: “It feels like now is an appropriate time to tell people that for Ox this coming season will be about focusing on recovery and rehab.
“We have known this from pretty much the day after he got the injury and after the successful surgery, we were sure of it. I hope everyone treats this information responsibly. There has been no change, no setback – it’s exactly on the schedule we expected and planned for. The new information is that we’re now giving more detail publicly.
“It is typical of Ox that he didn’t want the news to overshadow the end of the season and, to be quite honest, we thought we could wait and tell people at an appropriate time.
“His recovery has started superbly well. If we do see him back this season it will be a bonus.”
Oxlade-Chamberlain brought to an end a six-year stay at Arsenal by joining Liverpool last summer in a £35million deal.
Klopp added: “It is so important – because of how valuable and important he is to what we are looking to do here in the coming seasons – that the focus is on doing this right and not rushed. Ox is completely on board with this approach.
“He is such an outstandingly good person and someone who even when not playing is integral to the heartbeat of Melwood.
“I cannot wait to have him back with us for matches, but we will wait for him and we will show the patience that is required to make sure he comes back ready to continue where he left off: as one of the most outstanding performers in European football in that moment.”
Strengthening his midfield has been one of Klopp’s main priorities in the transfer window so far, with Naby Keita, Fabinho and Xherdan Shaqiri all arriving at Anfield.
The forward pair are yet to report back for training due to their involvement at the World Cup in Russia with Egypt and Senegal respectively.
But with both players having seen their participation come to an end after the group stages last month, they will return to club duty for the tour, which begins a week on Saturday.
Fellow forward Roberto Firmino, who reached the quarter-finals with Brazil, will report back as the club head to France for a training camp at the end of the month.
Between them, the three players scored 91 goals last season – a campaign which culminated with defeat in the Champions League final. Salah’s involvement in that showpiece against Real Madrid was ended prematurely by a shoulder injury.
Manager Jurgen Klopp said of Salah and Mane: “They had their holiday and then they’ll come with us to the USA. They only had three weeks’ holiday so it means they didn’t lose too much.
— Liverpool FC (@LFC) July 13, 2018
“We have to see how they present and then we’ll see if they can play in the games. They will be there.”
Those players who have been involved in the World Cup semi-finals will return the week prior to the Reds’ Premier League opener against West Ham on August 12.
Klopp added on the club’s website, www.liverpoolfc.com: “Bobby (Firmino) will be in for the second camp.
“Then we have the English guys, Simon (Mignolet) and Dejan (Lovren) – (they) will come another week later. We’ll already be back from France and will have exactly one week to prepare (for) the game (against West Ham). That’s no problem.”
Serbia midfielder Marko Grujic will also be present on the week-long US tour, which features games against Borussia Dortmund, Manchester City and Manchester United.
Some sparkling attacking play in the first half saw the Reds canter to 3-0 at the break through goals to Rafael Camacho, Sheyi Ojo and Adam Lallana, before two defensive errors, including another shocking mistake by Loris Karius, saw the hosts claw themselves back to 3-2 in the second half through goals to Jonny Smith and Amadou Soukouna – and almost equalise in the final moments.
As pleased as Jurgen Klopp will have been by the first 45 minutes, he will be at least the equal in fury at the shoddy second half. Same old Liverpool.
Here are our ratings for both Liverpool XIs – one in each half – used on the day.
I don't like being a twat to a Liverpool player, but just get it done. Bring in Schmeichel or someone. It's obvious we can't begin the campaign with Karius as no.1. Mindbogglingly obvious. Wish the lad well but it's not going to work with us.— Empire of the Kop (@empireofthekop) July 10, 2018
FIRST HALF (4-1-2-3)
Danny Ward – 7: called on to make a super save on 33 minutes from Norwood, and then pushed away the resulting corner, did all he could to impress and surely must be given an opportunity ahead of the befuddled Karius.
Rafael Camacho – 9: played at right wing back though he is usually a midfielder, he finished his goal superbly and showed exceptional pace on occasion, set up a great chance for Lallana, the former Portugal Under 17 star is a real live wire and at just 18 has great potential.
Nat Phillips – 7: formed a solid central defence with Klavan and got forward well on two occasions to put headers on target, calm and confident 21-year-old, looks very promising.
Ragnar Klavan – 6: nearly shown up for pace once, didn’t have a lot to do at the back and so was rarely threatened, not as impressive as either Camacho or Phillips however getting forward.
Andrew Robertson – 7: good early chance missed, pin point cross for Solanke’s chance, formed excellent partnership with Kent and Lallana, was rarely threatened at the back and got forward well – as usual
Fabinho – 7: worked hard as a screen in front of the back four, combined well with Keita and pushed forward on occasion when the chance came, linked well between backs and forwards, busy game.
Naby Keita – 7: was closed down quickly early and lost possession once, not as dominant as against Chester, starting to develop a partnership with Fabinho, came into the game more as the half went by with some lovely touches.
Ryan Kent – 8: set up superb early chance for Robertson, worked very well on the left with Lallana, a constant menace to the Tranmere defence, impressive performance.
Adam Lallana – 7: got involved right from the start, linked well with Robertson and Kent down the left, finished his goal well with a strong left foot finish, grew into the game as the half progressed.
Dominic Solanke – 5: missed a simple chance set up by Robertson and another simple header from Lallana, gets in good positions and links well but looks less and less a Liverpool player, not a good enough source of goals.
Sheyi Ojo – 9: goal and an assist, did brilliantly to hold on to the ball on the right and set up Camacho for the opener, found space on the left to just send one by the right upright, then scored on the right soon after, only blemish missing a straight forward header late on. Gets better and better.
SECOND HALF – (4-1-2-3)
Loris Karius – 4: poor clearance almost presented Tranmere with a rare sight of goal, then fumbled a straight-forward free kick to present Smith with his goal, should have done better with the second, nightmare of the Champions League continues. Surely Klopp go not go into the season with the gaff-prone German as his No1.
Nathaniel Clyne – 6: Nice one-two with Wilson but scuffed the resulting chance, gave away the questionable free kick that led to Smith’s goal, a great ball in that Wilson and Origi both failed to convert.
Joe Gomez – 6: got forward often and had two good chances he could not convert, some poor defending to let Smith in for a chance that he did not convert.
Pedro Chirivella – 7: playing in the unfamiliar role of centre back but handled it comfortably except for one glaring error, worked hard when needed, nice interception to break down a promising Tranmere break, bad mix up with Milner to give the second goal to Amadou Soukouna.
Alberto Moreno – 6: was asked very few questions in defence and got down the left without ever delivering the telling pass, a middling game where he did nothing outstanding either good or bad.
James Milner – 7: Strong and controlled as the screen in front of the back four, nice distribution and linked well, will be disappointed about the mix-up with Chirivella that presented goal to Soukouna.
Ben Woodburn – 6: disappeared for much of the half as he did against Chester, Klopp is using him in a central midfield role which Woodburn does not seem to have warmed to, looks a shadow of the player who burst into the side so impressively last season, but grew into the role during the half and delivered some telling balls as the game wore on.
Curtis Jones- 8: 17-year-old Academy player has looked superb against Chester and again tonight, busy off the ball with some great movement, looks a great prospect, worked hard right to the end trying to find the fourth goal.
Harry Wilson- 7: Set up Clyne superbly with a lovely turn on the edge of the box and lively with and without the ball through the entire 45-minutes, classy youngster, missed two good chances late in the half which drags his ranking down
Divock Origi – 6: one good early run down the left but couldn’t make the best of the resulting chance, made up a good combination at times with Clyne down the right, worked hard and tried to get on the ball without doing a lot with it, lost his goal scoring touch
Daniel Sturridge – 7: has looked extremely sharp in pre-season, dropped back to play the false nine role usually played by Roberto Firmino, good distribution and silky on the ball, strong effort on 78 minutes from the left but well saved by the Tranmere keeper, needed to score to really cap a good afternoon.