A stunning display by Borussia Dortmund star Mario Gotze helped his side secure qualification for the Champions League with a thumping 4-1 win at Ajax.
"We didn't necessarily play badly at times, but they were deadly when they got possession," Ajax full-back Daley Blind said.
"They are the most impressive team we've played in this group - they have the capacity to go very far in the tournament."
Blind was caught out of position early on, leaving wide open spaces for Mario Gotze and Marco Reus to exploit before Reus opened the scoring.
Gotze, 20, was named man of the match after scoring the second and setting up his side's other two goals, both scored by Robert Lewandowski.
"Of course, it was one of my better games," Gotze said. "But I think it was a very, very good team performance.
"We are delighted to be top of the group. We are also looking forward to the forthcoming games. The Champions League is a very big challenge, and you need to rise to the occasion."
Borussia were clinical in front of goal in a performance during which the only negative was a suspected broken nose for Sven Bender. "His opposing player was substituted with a bruised elbow," Dortmund boss Jurgen Klopp said. "This pretty much says it all."
He praised his team's performance, saying: "Ajax had much more possession, but we played disciplined. The goals were all wonderfully set up and came at the right time."
The club's general manager, Michael Zorc, said: "You have to give credit to the team. Nobody would have expected this. We were hoping to be a surprise team - and we achieved that in impressive fashion."