Striker Diego Costa has vowed to do his utmost to deliver trophies for Chelsea.
The Brazil-born Spain striker joined the Blues from Atletico Madrid, who he helped to a first Primera Division title in 18 years, breaking the duopoly of Real Madrid and Barcelona.
Jose Mourinho’s Chelsea are chasing a first Premier League crown since 2010 when the new season kicks off next month.
Costa carries a heavy burden, with Mourinho bemoaning his strikers last term and Chelsea’s forward recruits having a history of struggling to make a prolonged impression, Didier Drogba apart.
Costa said: “I’d say to the fans that you need to be confident that I personally will fight for this club to make sure we are in contention to win as many trophies as possible
“I’m part of a great group here of players and we will do everything we can to give the fans what they want – and that’s titles.”
“It was an easy decision for me to make,” he added. “We have some of the best players in the world, the best manager in the world and it’s a club with great history.”
Mourinho wants Costa to perform the way he did for Atletico and the striker believes his attributes mean he is suited to the Premier League.
“One of the main things he (Mourinho) said was that he doesn’t want me to change,” added Costa, who scored 64 goals in 134 appearances for Atletico.
“It was Jose’s and the club’s decision to buy me and the reason they signed me was because of the way I played at Atletico.”
Costa is with the Chelsea team in Austria but didn’t get on the pitch on Wednesday as they drew 1-1 with WAC RZ Pellets.
Costa’s former Atletico team-mate Felipe Luis started at left-back with teenage French midfielder Jeremie Boga scoring the Blues’ only goal.
Barcelona midfielder Rafinha Alcantara has expressed his delight at Xavi Hernandez's decision to stay at the Nou Camp next season.
Throughout the summer Xavi has been linked with a move away from the club where he has spent his entire career.
First Qatari club Al-Arabi were expected to capture his signature, with coach Dan Petrescu announcing during the World Cup that the 34-year-old had agreed a pre-contract deal with his team.
When that move broke down, new MLS franchise New York City were reported to be in pole position to land the former Spain international before Arabian Gulf League Club Fujairah announced their intention to enter the bidding war for the Barca legend, a story broken by Sport360°.
However, Xavi is expected to report for pre-season on Thursday with fellow internationals Sergio Busquets, Pedro Rodriguez, Gerard Pique and Jordi Alba.
And Rafinha, who returns to Barcelona following a successful loan spell working under Enrique with Celta Vigo, is looking forward to learning from Xavi, who has played more than 700 times for the Catalans.
"Xavi is Barcelona, for us it's great news that he's staying and I'll be able to share a dressing room with him," Rafinha told a press conference.
"I'm going to learn from the best in the business and I'm delighted that he's staying. To be able to learn from the best for me is incredible."
The 21-year-old avoided a question about whether Xavi staying at the club would reduce his own chances of holding down a regular place in the first team, responding: "I don't know, you'd have to ask someone else that question."
However, the player believes he has developed into a better footballer as a result of his loan spell in Galicia and is determined to become as important a member of Enrique's side at Barcelona as he was at Celta.
He added: "It was a very good experience for me and has made me a more mature footballer. Now the most important thing is playing and getting minutes on the pitch."