Juventus sit top of Serie A, six points ahead of Inter Milan and Napoli.
"In the first half Bournemouth was the best team by far and in the second half United were the best team by far".
Herrera is one of a number of players who are on the final year of their deals, but the Spaniard hasn't started many games this season.
Ander Herrera had been particularly influential after being introduced as a substitute for the second half.
"He's a player of balance, he's not an incredible creator, not an incredible scorer, he has a little bit of everything but I think he's a player of balance, knowledge, his tactical knowledge is big, he understands what I want, what the team needs".
"So when the team is really defensive and you have a more defensive mind then you base the work on that then the team doesn't develop enough in other areas but the team managed to get results based on that".
Inter took control in the first half with two goals in as many minutes from Gagliardini and Politano - both of them following mistakes by the Genoa defense.
"In the second half I knew by having the two brothers on the bench - Rashford and Lingard - I knew the brothers could come in and make an impact", the Portuguese manager said after the game, as reported by Manchester Evening News.
"We will wait for Monday".
Costa was forced off during the win over Cagliari at the weekend after picking up a muscle problem in his left adductor and the winger underwent physiotherapy treatments at the Juventus training ground on Sunday afternoon.
Bournemouth manager Eddie Howe insists that is a matter for Southgate but praised his player's contribution. And I walked, with a hoodie, in the middle of the fans, nobody recognised me.
"He continues to score goals and again today he was a real, real threat".