Gianfranco Zola has hailed the positive impact the international break has had on his players.
While some Premier League managers have been irked by the latest round of friendlies, West Ham boss Zola has had no such worries.
The likes of Matthew Upson and Craig Bellamy have performed impressively for their countries this week and Zola believes the Hammers could benefit.
West Ham are without a win in seven matches ahead of Sunday's game against Sunderland but Zola is glad some of his players have found form.
"Normally it's a difficult week after internationals but my players all played good games in their teams," said the Italian.
"Some of them like Bellamy and Upson got a goal as well so I hope they can take the enthusiasm from that midweek game to Sunderland, which is going to be very important for us."
Zola also believes that Upson's display against Germany has left England boss Fabio Capello with an interesting selection dilemma.
"Matthew has been confident and full of smiles yesterday and today. It's good. The national team can be very important for the players.
"For him, it's even more important. He scored and I'm pretty sure he will play a great match on Sunday.
"It's good for Capello as he has a lot of choices.
"It's important for Matthew that he has proved he can play instead of Rio (Ferdinand) and John Terry.
"He's an important player for us. He's experienced and has a lot of enthusiasm. The national team is great.
"In many ways it can help a player and it also helps his team-mates. To play alongside a national-team player is something good."