Arsenal manager Arsene Wenger is unsure whether north London rivals Tottenham will be able to fill temporary home ground Wembley Stadium this season.
Spurs are set to play their home games at England's national stadium this campaign while the new White Hart Lane is being constructed.
Mauricio Pochettino's charges struggled when they played their European home games at Wembley last season, but Wenger believes Spurs' concerns about playing at the stadium is purely psychological. He did, however, raise concerns over whether they can fill 90,000 seats.
"I think it is all a little bit in your head," Wenger told the press when asked about Spurs' struggles at Wembley, as quoted by Four Four Two.
"For a while, you had the problem of the quality of the pitch but that does not exist anymore. Today, the pitch is of a similar quality to everywhere.
"After that, the difficulty is to fill it, nothing more. In England, we are not used to playing with half a stadium empty. So can they fill it in every game? I don't know. A full Wembley Stadium is fantastic."