The Gunners booked their place in the final of this season’s Champions League thanks to a hard-fought win over LaLiga side Atletico Madrid.
Visibly struck by the pre-match scenes and the energy inside the stadium, the Englishman told Arsenal media: “I can't describe it to be honest with you.
“It's been coming, this night at the Emirates in general, I think it's the best night at the Emirates that I've witnessed, even better than the Real Madrid game last year.
“From the moment we drove in today, the coaches stopped and we thought, 'What's going on?'
"Because usually we just drive straight in, and the next thing we just see all the flares and the fans and the goosebumps from all the players looking out the window, it was just incredible.
“I've not seen the Emirates like that, so a big thank you to the fans because we needed that. And when we came in as well, you could feel the energy from everyone.
"Even if you're tired, it just gives you that energy to keep going, and I think they played a massive part tonight in making us win.”