Tottenham are among the clubs following Vasco da Gama's young forward Rayan Vitor.
Club scouts have been monitoring his progress in recent months and checked on him again last week when he scored in a 2-0 win over Cruzeiro.
The 19-year-old was a prolific goalscorer throughout his youth and while his strike rate has dropped, he is still making an impact at first team level.
Quick and aggressive, Rayan is tipped for a national call-up to Carlo Ancelotti's senior Brazil squad also.
He has a release clause set at £34million but suitors are hoping he can be prised out for less.
However, competition is building with Nottingham Forest, Chelsea, Liverpool, Brighton, Barcelona and Zenit St Petersburg among the clubs who have also been to watch him since the turn of the year.
Tottenham have been looking for a striker as they need depth in that position.
Richarlison was a player Spurs were willing to sell in the summer but has done well under Thomas Frank while Dominic Solanke has undergone ankle surgery and is expected to have clarity on his return date over the next week.
Tottenham also hope to see Radu Dragusin pick up his recovery from a cruciate ligament injury in the next few weeks.
The centre back was wanted by the Romanian national side this month but will continue his rehab with Spurs in the hope he can make a return to full training soon.