Gonzalo Higuain arrived at Chelsea in January on a loan deal from Juventus after his loan spell at AC Milan was cut short.
But the Argentine's spell at Stamford Bridge hasn't been easy, and he called time earlier this week on his international career as he confirmed his retirement.
Maurizio Sarri was asked whether he'd like to keep the 31-year-old at Chelsea beyond the summer: "I don't know. I'd like to see him at the top in the last two months.
"At the moment, only this is very important. We need Gonzalo at the very top. It's not easy to get used to this league. The level is different.
"The way of playing is different. Especially for a striker, it's very difficult to get used to the Premier League in only one, two months. He said to me that it's difficult because the physical impact of the defenders here is really very strong.
"The referees here are very different than in Italy, so it's another football for him. Especially for the striker and the goalkeeper, I think it's really very different. So I think he needs time, but we have no time. We need him at his top level in the last two months."
Higuain will be hoping he gets the nod on Sunday ahead of Olivier Giroud but we need someone to step up. The goals have to come from somewhere - a department in which Chelsea have been struggling of late.