CHINESE club Tianjin Quanjian are plotting? a stunning £80million bid for Chelsea striker Diego Costa. The Algeria international has helped his side up to third this season and is regarded as one of the best crossers in Serie A, which Diego Costa would thrive on. The former Southampton man has appeared for less than 15 minutes in the Premier League this term and only featured in eight games this season. ke his debut in?Boro’s FA Cup third round clash against Sheffield Wednesday next weekend according to the Daily Mail. The Premier League leaders have made contact with the left-back’s agent to sound out whether he would be willing to make a January transfer window switch to Stamford Bridge. “The leadership at Juventus have always behaved like gentlemen with me and I can only be grateful to them. The 28-year-old has been ever present this season for Los Rojiblancos who are third in La Liga, four points off leaders Real Madrid. The Spaniard is currently out injured after having surgery on his chronic ankle problem in December, which ruled him out for three months, meaning he will return in February. etitionsIf he were to move, he would follow in the footsteps of Luka Modric and Gareth Bale, who have both made the same move in recent years. The Russian club are bankrolled by Gazprom and signed the Belgian and Brazil star Hulk, who coincidentally now also plays in China for Shanghai SIPG, in a combined £64m deal.