Roberto di Matteo says Didier Drogba is welcome to train with Chelsea when he prepares for the Africa Cup of Nations in January.
Drogba left Chelsea at the end of last season, and has just finished his maiden campaign with Shanghai Shenhua.
Manchester United striker Robin van Persie has pulled out of the Netherlands squad for Wednesday's friendly with Germany.
Van Persie completed the full 90 minutes in the weekend defeat of Aston Villa, but is now struggling with a thigh injury.
Arsenal manager Arsene Wenger is worried the international break could prove detrimental to his squad with more important fixtures on the horizon.
The Gunners are eighth in the Premier League, four points outside the Champions League places, and face a vital clash with Tottenham next weekend.
Spurs captain William Gallas says the club are ready to take out the frustration of defeat to Manchester City on their north London rivals next Saturday.
Tottenham led 1-0 against the Premier League champions, but slipped to a 2-1 loss.
It was a win Roberto Mancini described as 'huge' as Manchester City kept the pressure on league leaders Manchester United.