The January transfer window is almost over with Premier League teams trying to bolster their squads before the Monday night deadline. 

In regards to the top Premier League sides, Liverpool and Arsenal are yet to make a move in the January transfer window. Whereas rivals Manchester City have signed three players.

Furthermore, Aston Villa have been embroiled in transfer news in recent days as they rejected a bid from Arsenal for Ollie Watkins. Villa have also been linked to signing Marcus Rashford on loan this month.

But with the focus on the January window, many are forgetting that there are some valuable Premier League players with contracts that expire in the summer transfer window. But who are the five most valuable, and where could they go in the summer? (Valuations sourced from TransferMarkt.)