Sampdoria striker Fabio Quagliarella has admitted he could be tempted by a move to Manchester United this summer. United reportedly made a 10m offer last month to sign the Italy international and, according to Quagliarella, they have now increased that amount in the hope of beating off a host of Serie A rivals for his signature.

When asked about United’s offer, Quagliarella replied: “It seems a serious offer, they have raised it and it is an important figure. Manchester United are a big deal and if it ended up going that way, I would gladly join the Premier League. It is a fascinating and beautiful competition.”

Quagliarella joined Sampdoria last summer from Ascoli, although his sporting rights are co-owned by both the Genoa club and Udinese. He made 35 league appearances last season, scoring 13 goals, and his performances earned him a call-up to the national team, where earlier this month he scored his first two goals for the Azzurri during Italy’s 2-0 Euro 2008 qualifying win against Lithuania.

However, Quagliarella, who is under contract with the club until 2010, did admit he would be equally content to continue his career in Serie A, saying: “I am really happy at Sampdoria. I would prefer to remain in Italy, having continuity and having the trust of [national team coach Roberto] Donadoni.”

Czech Republic striker Jan Koller insists he is happy at Monaco and has heard nothing about a possible move to Reading, in the wake of newspaper reports linking him with a switch to the Madejski Stadium.

“I have not heard anything,” declared the 34-year-old. “There is no point in talking about it, I have a contract with Monaco and I am happy there. We have a new coach [Ricardo Gomes], I do not know what he will be like, but I will start summer training with maximum effort and I want to see out my contract.”

Leicester have continued their summer recruitment drive with the signing of Bulgaria international midfielder Radostin Kishishev from Charlton on a two-year deal. The 32-year-old, who impressed during a loan spell with Leeds at the end of last season, becomes the sixth new arrival under Foxes boss Martin Allen.

“He has had other clubs after him so it has been a bit of a nervy wait but I’m delighted that he has agreed to come here,” said Allen. “He is down to earth and he is not big time. He is a solid citizen and he will be good for this club. He gives us some steel in the centre of midfield and knows what the game is about.”