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 ...
Could the billionaire businessman be heading to Anfield?
Potter has held talks with owner David Sullivan over replacing current boss Julen Lopetegui , who took training on Tuesday despite the club actively working towards appointing his successor.
According to reports, Chelsea are 'leading the race' to sign Manchester United starlet Kobbie Mainoo, who is available for a couple of reasons.
A familiar face could be returning to the Emirates.
The latest Arsenal transfer news as Matheus Cunha remains a January target after avoiding a lengthy Premier League suspension ...
The latest Chelsea transfer news after the club have been linked with a stunning move for Manchester United's Kobbie Mainoo ...
Arsenal will welcome Newcastle to the Emirates Stadium on Tuesday evening - and there will be new some VAR rules in place for the Carabao Cup clash ...
Chelsea transfer news as Aaron Anselmino left out of key January squad with Enzo Maresca priorities coming first after loan recall ...