Diego Costa looks set to be sidelined for at least two weeks after sustaining another hamstring injury during Chelsea's 2-1 win over Stoke City. The Spain international is likely to miss Chelsea's upcoming Barclays Premier League matches against west London rivals Queens Park Rangers and Manchester United. Jose Mourinho threw Costa on at half-time after going into the interval at 1-1 following Charlie Adam's outstanding 66-yard equaliser to cancel out Eden Hazard's opener. Chelsea striker Diego Costa limped off with a hamstring injury shortly after coming on at the interval . Blues striker Costa looks despondent as he sits on the turf following another injury to his hamstring . However Costa, who replaced Blues team-mate Oscar, lasted just over 10 minutes as he pulled up with a hamstring injury. Mourinho's gamble did not prove to be too costly as Loic Remy netted his side's winning goal just five minutes after Costa limped off the Stamford Bridge pitch. The Portuguese tactician, speaking to Sky Sports after his side's win, said: 'In football we have to take risks and as a manager if we have a tough result then I have to make decisions such as bring Costa on in the game. 'All the scans they did two days ago said the muscle was clean, the image was clean and he trained 100 per cent for two days. He did more in those training sessions then he did in the game, he took lots of shots. 'The player was convinced he was ready, not for 90 minutes, but he was ready to play and to help the team. Costa looks in pain after pulling up at Stamford Bridge during Chelsea's 2-1 win over Stoke City . Jose Mourinho was happy to have gambled with Costa's fitness despite losing the striker after 10 minutes . 'Sometimes as a manager I have to risk things. Medical departments have to do the same, if they want to be top medical departments like our department is. 'The safe medical department cannot work with me. People with fear, afraid to risk, cannot work with me. 'My medical department is fantastic, they do fantastically well for us. 'Today between them and the player and myself, things didn't happen the best way, but I'm happy with that, because it's football." 'If we were 2-0 or 3-0 up we planned not to use him until next week but we had to take that risk. He looks to be out for a couple of weeks minimum but I'm glad we got the points.' Chelsea are currently seven points clear at the top of the table with a game in hand over second-placed Arsenal.
Chelsea star Diego Costa looks set to miss his side's next two games .
Costa was forced off through injury shortly after coming on at the interval .
Jose Mourinho has revealed Costa is likely to be out for 'a couple of weeks'
Chelsea face QPR and Manchester United in next two league matches .
Click here to read Sami Mokbel's match report from Stamford Bridge .