Porto defender Diego Queiros is on the radar of Premier League clubs.
Bournemouth are targeting the young centre-half, while O Jogo says Arsenal and Tottenham have also expressed interest.
Having lost Diogo Dalot to Manchester United, Porto management is desperate not to lose another young defender.
Queiros penned terms to 2021 a year ago with Porto, which also includes a buyout clause.
The defender can leave for €25m.