James Ward-Prowse has made an immediate impact with a goal and two assists in his two appearances since joining from Southampton, while Ghana international Mohammed Kudus became their latest new arrival when he joined from Ajax for at least £38m on Sunday.
The Hammers have taken seven points from their first three league matches.
"You get the maximum you can for one single player. I think it was right that Rice moved on - he'd served his purpose, got himself into a position where he was worth that money and it was right that West Ham took it.
"The secondary to that is that you spend it wisely. I think Ward-Prowse is a brilliant signing. For set-pieces alone, he is a great signing, and he's a wonderful football player as well.
"They're using the money very wisely and they've become a stronger squad because of that. Everything's going so well for them at the moment."