Manchester City have been warned they could miss out on Brazilian striker Jo, by the player's advisor Kia Joorabchian.
Joorabchian is working as a consultant for Jo as the CSKA Moscow forward ponders a move away from the club this summer.
City are believed to be leading the chase for the 21-year-old with reports suggesting he has held talks with the club over a possible move to Eastlands.
However, Joorabchian claims one of the Premier League's top four could make a move for Jo and that Spanish side Valencia are ready to battle City for the South American's signature.
"But Jo is so good, it would not surprise me if one of England's big four clubs who need a centre forward also go for him."