Drogba has been linked with a move to Spain or Italy
Manager Luiz Felipe Scolari insists Didier Drogba is "very happy" at Chelsea, despite the striker pulling out of the pre-season tour of Asia.
The decision prompted fresh speculation over the future of Drogba, 30, who has been linked to AC Milan and Barcelona.
Chelsea said the Ivory Coast star stayed behind for rehabilitation on a long-standing knee problem.
Scolari stated: "Didier's future with Chelsea is normal because he has a contract. I think he's very happy."
Scolari added that Drogba needs up to four weeks to fully recover from the problem.
Drogba's agent has hinted that the forward may agree a new deal at Stamford Bridge before the new season starts, despite the reported interest from Italian and Spanish clubs.
We have had discussions with Madrid over buying Robinho and they are ongoing
Chelsea chief executive Peter Kenyon
Scolari claimed at his official unveiling as new Blues boss earlier this month that Drogba was still "200% in his plans" for the squad.
England midfielder Frank Lampard, 30, was included in the squad that left London for China amid ongoing reports about a move to Inter Milan.
Claudio Pizarro was also omitted from the tour squad because of injury but Michael Ballack will join his team-mates in China after taking a holiday following his exploits with Germany at Euro 2008.
Chelsea open their tour against Guangzhou Pharmaceuticals on 23 July and follow that with matches against Chengdu Blades in Macau three days later and a Malaysian Select XI in Kuala Lumpur on 29 July before travelling on to Russia for two games.
Meanwhile, Blues chief executive Peter Kenyon has denied that the club have made an offer for AC Milan's 26-year-old Brazilian playmaker Kaka.
Milan vice-president Adriano Galliani was reported in the Italian press over the weekend as saying: "It's true that Chelsea made a conspicuous offer but I will not say how much it was."
But Kenyon insisted: "There was no offer made. I have read the same articles.
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