Arsene Wenger will be well-versed in the talents of France international Djibril Sidibe but he may not get the chance to see them first-hand.
The Baggies are one of a number of Premier League clubs interested in the France Under-21 midfielder.
Fabinho was heavily linked with a move to Old Trafford at one stage this summer, and Manchester United fans will certainly be keen to see him there, after his sparkling performance against Tottenham in the Champions League at Wembley Wednesday night.
The picture that will leave some West Ham United fans scratching their heads as supporters of bitter rivals Tottenham Hotspur stand throughout Wembley tie.
The Tottenham Hotspur midfielder played under the Portuguese at Sporting.
Vadim Vasilyev has put the blame for Falcao's struggles in England down to the clubs rather than the player.
Tottenham Hotspur take on the French club next week.
With the summer transfer window closed, Jose Mourinho has one eye to January in case he needs to make improvements.
Ivan Cavaleiro joined Wolverhampton Wanderers from AS Monaco in the summer transfer window.
Arsenal, Tottenham and Manchester City are keen on Monaco's Ruben Vinagre.