Adrian was one of few Hammers players to emerge from the first leg with any credit.
The Moroccan international shone in Ligue 1 last season, but will the Hornets manage to bring him to the Premier League this summer?
HITC Sport understands several clubs are tracking former Ipswich Town forward.
Everton are reportedly targeting Anderlecht star Kara Mbodji.
Leeds United could be the latest Championship club to be sold to Chinese investors.
Arsenal have been looking to strengthen in the final third for much of the summer.
Hornets pair Almen Abdi and Daniel Pudil have completed their moves to Hillsborough.
Mauricio Pochettino worked at Southampton before moving to Premier League rivals Tottenham Hotspur.
Rangers reportedly won't be bringing striker Joe Garner to Ibrox this summer.
The full-back came in for stern criticism for his poor performances last season.