Diego Costa is reportedly a transfer target for Tianjin Quanjian, with the Chinese Super League club aiming to convince Chelsea to part with the striker.
Chelsea have surged to the top of the Premier League in recent weeks, with Costa impressing greatly.
The Brazilian-born Spain international has rediscovered his sensational form of 2014/15, providing a clinical and calmer presence at the tip of Antonio Conte's XI.
Costa has netted a Premier League-high 14 goals this season, with his latest coming in the 4-2 win over Stoke City on New Year's Eve.
His brilliant set of performances under the Italian coach come just five months after a raft of transfer speculation, with Diego Simeone having confirmed he was interested in re-signing Costa for Atletico Madrid.
According to Marca, the Blues star's suitors are now in a different continent, with Tianjin Quanjian eyeing an ambitious deal.
Fabio Cannavaro's side made a bid of €60 million for Costa in December, the source suggests, which was rejected by Chelsea.
The report claims that Tianjin Quanjian will now increase their offer to €90 million, as they seek a replacement for Luis Fabiano, whose contract has now expired.