Quagliarella, 23, scored 13 goals for Sampdoria in Serie A this season and netted both of Italy's goals in their 2-0 win at Lithuania last week in his first start for the Azzurri.

Sampdoria director Beppe Marrotta made his valuation of Quaglirella by comparing the fee AC Milan paid Parma for Alberto Gilardino two years ago.

"Taking into account that 24 million euros (32 million dollars) was paid for Gilardino, then I would say that the valuation for Quagliarella would be between 15 and 20 million euros (20 and 27 million dollars)," Marrotta said.

"I am tremendously pleased for the boy for his performance for Italy, and obviously his goals have bumped up his value on the transfer market.

"I admit there are many clubs interested in buying him, but we would like him to stay with us for another season.

"However, he is also owned by Udinese, and any decision about his future will taken together with them."

Udinese owner Giampaolo Pozzo valued Quagliarella at a slightly higher price than Marrotta.

"He's worth at least 20 million euros (27 million dollars)," Pozzo said.

"For his age, and for what he has shown he can do, he's is a very important player."