Mohamed Elyounoussi
Elyounoussi joined Saints for £16m from Basel at the beginning of last season and arrived with a growing reputation around Europe.
His first 19 appearances in England though saw him unable to adapt to his new surroundings and he was sent out on loan to Celtic for the 2019/20 campaign.
The Norwegian has impressed in Glasgow – scoring seven goals and assisting a further six in 17 appearances so far.
More recently it has been reported that La Liga side Real Sociedad are also interested in signing him in the summer.