The Chile international limped out of training on Sunday and Bayern are waiting to hear how long he will be sidelined for.
“Arturo went down without any contact and injured himself,” said Bayern head coach Heynckes.
“A part of the joint has come free. He needs a small operation and will be out for the short term, but we don’t yet know how long for.”
Bayern host holders Real next Wednesday, April 25, in the first leg of their semi-final at the Allianz Arena, with the return leg in Madrid on May 1.
However, Heynckes did not rule Vidal out of facing the Spanish giants.
“He would have liked to play against Real,” said Heynckes.
“Arturo is a fighter, he’s a very professional player and he really wants to play.
🗣 Jupp #Heynckes: “Arturo had a trip without any contact from anyone else. He has a loose body in the knee joint. He needs a small procedure and will be out for the time being.” #B04FCB pic.twitter.com/CiaQzTt7oh
— FC Bayern English (@FCBayernEN) April 16, 2018
“He is one of those players who can really bite his teeth, he is not squeamish and (he is) highly professional.”
Nevertheless, losing the 30-year-old for forthcoming key games is a blow to Bayern’s hunt for the treble.
Vidal will miss Tuesday’s German Cup semi-final against his old club Bayer Leverkusen.
French midfielder Corentin Tolisso is also struggling to recover from a knock.
A cup victory at Leverkusen would put Bayern in the May 19 final in Berlin – another step towards repeating their 2013 treble.
The Bavarian giants have already secured a sixth straight Bundesliga title, holding a massive 20-point lead over Schalke at the top of the table with four games left.
Provided by AFP Sport
“We are convinced that he is the right coach for the future of Bayern,” Bayern’s sporting director Hasan Salihamidzic said. The 46-year-old Croatian will get a three-year contract.
— FC Bayern English (@FCBayernEN) April 13, 2018
More to follow…
Eintracht Frankfurt delayed their pre-match press conference on Friday as reports claimed manager Niko Kovac has agreed to join Bayern Munich.
Kovac was due to face German media at 1pm local time (12pm BST), ahead of Saturday’s game against Bayer Leverkusen, but that was pushed back by two hours.
Frankfurt announced on Twitter: “This will allow the sporting director Fredi Bobic, together with Niko Kovac, to be able to speak and answer media representatives.”
Weekly magazine Sport Bild and its sister daily publication Bild reported that Bayern have chosen Kovac to be their new boss.
The reports said Kovac would be presented by Bayern before the end of April. The German football website Kicker said a fee of 2.2 million euros (£1.9million) would buy Kovac out of his contract, under a clause in the deal.
The press conference ahead of #B04SGE has been pushed back from 13:00 CEST to 15:00 CEST to allow board member Fredi Bobic to take questions along with Niko Kovac. As ever, we’ll be tweeting live! #SGE pic.twitter.com/RLxCLBE5P6
— Eintracht Frankfurt (@eintracht_eng) April 13, 2018
Bayern have been led by Jupp Heynckes since October, following the early season exit of Carlo Ancelotti, who was sacked in September. They clinched the Bundesliga title last Saturday with a 4-1 win against Augsburg and have reached the Champions League semi-finals.
Frankfurt sit fifth in the Bundesliga table and 46-year-old Kovac has been in charge of the first team since March 2016.
Croatian Kovac was born in Germany and spent almost his entire playing career in the German top flight, including a two-season spell with Bayern that ran from 2001 to 2003.
Provided by Press Association Sport