Chelsea winger Eden Hazard has advised club and international team-mate Kevin De Bruyne to leave Stamford Bridge in January, in order to protect his place in Belgium's 2014 World Cup squad, reports the Daily Telegraph.
The 22-year-old seems to have fallen out of first-team favour, following a series of disappointing early season performances, and is now growing increasingly concerned about missing out on next summer's finals in Brazil.
Blues boss Jose Mourinho has offered De Bruyne assurances that he will feature more frequently in his team in the coming months, but that hasn't thwarted the Belgian's desire to leave west London.
Wolfsburg are keen to sign the attacking midfielder permanently when the transfer window reopens, while Bayer Leverkusen and Atletico Madrid are believed to have expressed a loan interest.
Hazard warned De Bruyne that he must be playing regular football if he is to make it into Marc Wilmots's World Cup squad, having not featured in the Premier League for Chelsea since his substitute appearance against Fulham in September.
In his two years since signing for Chelsea, De Bruyne has enjoyed loan spells with Werder Bremen and former club Genk, but is understood to favour a permanent transfer in January.