Ex-Chelsea forward Jimmy Floyd-Hasselbaink says that Jose Mourinho would have been happier with Chelsea's Champions League success if he had been able to substitute Diego Costa.
Costa has been a mainstay in the Blues side so far and Hasselbaink believes that Mourinho would have liked to have been able to have the luxury of taking the Spanish international off against Sporting Lisbon last night to give him a well earned rest.
As it was, the Chelsea boss had to give Costa the 90 minutes as the two sides played out a tight encounter.
Although Mourinho's side did claim the 1-0 victory they could have been far more comfortable if they were not so profligate in-front of goal and Hasselbaink believes this wastefulness will have annoyed their perfectionist manager.
"He’s half thinking of Arsenal at the weekend. He can say 'no, I’m concentrating on Sporting' but he is thinking of Arsenal and if he could have given Costa 60 minutes instead of 95, he would have - and he would have been a lot happier."
Costa is Chelsea's main-man this season and Mourinho will be keen not to push him too hard.
The Brazilian born striker has made a huge impression over his initial time at Stamford Bridge, but he will need to ensure that his form doesn't dip as a result of tiredness.
Chelsea missed out on the title last season, because of their lack of a potent centre-forward, but Costa has already proven he can be the man to fire them to the top of the league.
That is where the Blues currently are and they will determined to hold on to that place as the season progresses.