In an exclusive interview with Transfer Tavern, Rob Lee, who spent one season with West Ham, believes David Moyes will need £100 million to spend this summer to keep the Hammers challenging next season.

Moyes has turned the Hammers' fortunes around this season after steering them clear of relegation last term, and West Ham now have their eyes fixed on qualifying for Europe after moving into the top four on Monday night.

In January, the club sold Sebastien Haller to Ajax but failed to replace him, putting their trust in the likes of Michail Antonio and Jesse Lingard to get the goals for West Ham.

Speaking on how much Moyes will need to keep the Hammers competitive and what he can expect to pay for a player this summer, Lee told Transfer Tavern:

"Well, I think if you look at the team they've got a good side, but as I said before if you get a few injuries then it's different.

"You're looking at spending £100 million because the average player costs £20-30 million and they'll be average, so they might not get into the team.

"Hopefully Gold and Sullivan are now in a place where they trust David Moyes' judgement on players to sign."

West Ham have been linked with a host of players, which include Championship duo Ivan Toney and Adam Armstrong who have both impressed in the Championship, much like Jarrod Bowen and Said Benrahma did.

The Hammers will look to keep hold of their star assets in Declan Rice and Tomas Soucek this season with Moyes confirming they will have to listen to offers.