English clubs were among the raft of teams represented by scouts at Porto's thrashing of Champions League opponents Leicester City.
Manchester City, Manchester United, Juventus, Arsenal, West Ham and Sunderland all had scouts posted on Wednesday night, says A Bola .
It's suggested all representatives were making a check on several of Porto's top liners.
André Silva, Danilo Pereira, Jesus Corona and Yacine Brahimi were all on show on the night.
Also in the stands were scouts from Beijing Guoan and Chongqing Lifan.