Chelsea and Barcelona are chasing Borussia Dortmund striker Youssoufa Moukoko ahead of the January market.

Sport says the two clubs are eager to prise Moukoko away from Dortmund.

Barca want to sign the 18 year-old as an understudy to senior striker Robert Lewandowski.

Chelsea, meanwhile, are willing to outbid all rivals to bring him to London. The Blues would be prepared to offer the centre-forward guaranteed regular football.

Moukoko is off contract in June, meaning he can enter Bosman talks with foreign teams from January 1.