Benfica midfielder Nemanja Matic has revealed that he would be pleased to return to Chelsea if the Blues' offer is good for both his current club and himself.
Recent reports claim that the Serbian midfielder has already agreed terms to sign for Chelsea during this transfer window and will undergo a medical in London on Tuesday.
However, the 25-year-old midfielder refuses to confirm a deal that would see him rejoin Chelsea just three years after he signed for Benfica as part of the £25 million transfer that saw David Luiz move from the Portuguese giants to London.
"I still can't say anything about this, let's see what happens in the future, you have to ask the club and the president," Matic told to Portuguese newspaper A Bola.
"If it's good for the club and for me, we'll talk. Let's see what happens until 31 January," he added.
The midfielder was valued at less than £5 million when he left Stamford Bridge in January 2011 but he has impressed since he moved to Portugal and reports claim that Chelsea are now poised to resign him for around £22m.
Matic is currently considered one of the best players in the Portuguese League and he was a key player in Benfica's run to the Europa League final last season, where they lost against Chelsea.
Manager Jose Mourinho is desperately looking to add a new central midfielder to a squad lacking players for the role after Marco Van Ginkel suffered a long-term injury earlier in the season and the Serbian leads a short-list that also includes Inter Milan's Fredy Guarin.
Matic made just two appearances in two seasons during his first spell at Chelsea following his arrival at the club in 2009.
In recent months the Serbian has also been linked with a move to Liverpool and Manchester United.