The Hammers chairman believes the player is going to be an exciting player for the future.
The Black Cats boss has come in for criticism after suggesting they will be in a relegation battle this season.
The Blues had been suggested as a potential destination for the Manchester City goalkeeper.
Manchester City beat Steaua Bucharest 6-0 on aggregate in their Champions League qualifier but what did we learn?
The 23-year-old American right-back joined the Magpies from Tottenham Hotspur on Wednesday for a reported £5 million fee after spending last season on loan at Sunderland.
League One side Northampton Town have been drawn against giants Manchester United in the third round of the EFL Cup.
Southampton have joined Liverpool and Stoke City in the race to sign Inter Milan left-back Caner Erkin.
The 20-year-old enjoyed the best debut possible, scoring the Whites' winner against Luton Town in the EFL Cup on Tuesday night.
Mark Warburton has brought 10 new players to Ibrox this summer.
The former Magpies boss believes they must first find the right blend and balance first.