Cesc Fabregas
Fabregas has been in excellent form at Chelsea this seasonReuters

Chelsea have been hit with more injury concerns as Cesc Fabregas is reportedly facing three weeks due to a hamstring injury during the Blues 2-1 win at Liverpool.

Blues boss Jose Mourinho, who admitted that he took a gamble by playing the already injured Fabregas against Liverpool, recently revealed that the former Arsenal captain could be missing Chelsea next Premier League clash against West Bormich Albion.

"Fabregas may have a problem for the next match, we gambled everything on a hamstring problem and the medical department and I decided he could play," Mourinho said after Chelsea's win at Liverpool, according to the Express.

However, now the Evening Standard claims that Fabregas, who has been excellent for Chelsea this season, has been ruled out for three weeks with a hamstring problem.

This news means that the former Barcelona midfielder will not be available during Spain's 2016 Euro's qualifying game against Belarus and a friendly clash against Germany on Saturday and Tuesday respectively.

Despite the injury resulting due to Fabregas being given very little rest at Chelsea this season, the Spaniard insists that he does not have any complaints.

"I have missed this a lot (playing game after game). In my three years at Barcelona I played a lot, but I was always the first one to be substituted or coming from the bench. I was hardly ever playing 90, after 90, after 90," Fabregas told the Evening Standard.

Meanwhile, Oscar has vowed his loyalty to Chelsea by signing a new five-year contract with the West London club.

The 23-year-old Brazilian has established himself as one of the key players at Chelsea following his £19.35 million move from Brazilian side Internacional in the summer of 2013.

And now Chelsea have rewarded Oscar by offering him a new long-term deal.

"Chelsea Football Club is delighted to announce Oscar has today signed a new contract, keeping him at the club until 2019," read a statement in Chelsea's official website.

The former São Paulo midfielder, who has already netted three goals this season, expressed his delight at having penned a new deal with the Blues.

"I am so happy because I love playing for Chelsea and living in England. I have enjoyed playing here for two years, and now I have five more, so I am very happy," Oscar told Chelsea's official website.