Frankfurt are reluctant sellers, particularly in the winter window, and had hoped to keep hold of the 25-year old who has scored 18 goals in 24 appearances this season.

Chelsea have never been afraid to spend big in the January transfer window, making marquee signings to transform their fortunes ...

Tottenham Hotspur have already made one new signing this month and need to make at least another during January to address the Premier League's largest injury list ...

Arsenal have been on the receiving end of some controversial refereeing calls in the Premier League this season ...