Turkish giants Fenerbahce and Galatasaray are keen on making summer offers for Arsenal youngster Joel Campbell, who is currently on a season-long loan at Olympiacos.The Costa Rican starlet has had an impressive season with the Greek champions, making a name for himself with his superb performances in the Champions League.Campbell scored against Manchester United in his side’s 2-0 win in the first-leg of the Champions League last-16 tie.Ever since that performance in Piraeus, the youngster has been tipped for a return to the Arsenal first team for the forthcoming season.However, Arsene Wenger has given no clarification as to whether he wants Campbell to be back in the squad and, as a result, Galatasaray and Fenerbahce are monitoring the situation closely.Olympiacos are also keen on signing Campbell on a long-term deal but the financial muscle of the two Turkish clubs could prove decisive if a bidding war was to commence.