Antonio Conte has played down reports Diego Costa has agreed a close-season switch to China.
Costa sat out last month's 3-0 victory at Leicester City following a reported disagreement over a back injury, with talk of a move to the Chinese Super League's Tianjin Quanjian gathering momentum.
The issue appeared to have been resolved when Costa made a goalscoring return to the first-team fold and Conte declared the Spain international happy at Stamford Bridge.
Commenting on the persistent links, Conte said: "I don't know, but every week I hear a lot of news and a lot of speculation about Diego.
"I think now the most important thing is to be focused on this championship and we are in a good position.
"Diego is an important player for us and he is happy. This is the most important thing. The summer is a long way away."
Chelsea were linked with moves for Celtic pair Moussa Dembele and Craig Gordon towards the back end of the January transfer window.
"For Dembele, I never talked with my club about this player," said Conte.
"For Gordon, we tried because we wanted to help Asmir Begovic satisfy his request to go and play every game - I always told him if we were able to find a right solution he could leave.
"We tried, but when the club told us it was not possible, we finished."
Begovic had been linked with a move to Bournemouth but that transfer never materialised after Conte failed to secure a replacement.