Manchester City target Sporting Lisbon wonderkid Rafael Leao
The striker is regarded as one of the most-promising attackers in Europe after his exploits in Portugal.
Leao, a Portugal Under-21 international, has burst onto the senior scene this season and scored 12 goals in 19 matches. Six of those have come in his 11 league matches, with the starlet also providing one assist.
Sporting have already rejected a number of approaches from interested parties across the continent over his availability.
That led them to extend the youngster's contract until 2022 last October. However, the report states that his new deal includes a release clause of £53m.