Manchester United, Manchester City and Liverpool also had representatives at Benfica versus Sporting Lisbon on Wednesday.
Reports from Portugal claim that Manchester United target Faouzi Ghoulam is about to become available.
Barcelona bafflingly failed to prevent Alex Grimaldo leaving for Primeira Liga giants Benfica - now a move to the Premier League with Spurs is possible.
Tottenham Hotspur are reportedly interested in Alex Grimaldo.
Liverpool and Tottenham have both been linked to Alex Grimaldo.
Danny Rose is expected to leave Tottenham Hotspur and the search for his replacement is on.
Alex Grimaldo was watched in action by the Manchester City boss yesterday.
The Gunners could face competition from Bayern Munich for the player, however.