Arsenal boss Arsene Wenger admits he feels the pressure of keeping up with their big spending rivals.
Wenger says he is under scrutiny to add to his squad before the window closes on September 1.
"Of course, there is pressure to keep up with them," said Wenger. "All of them have spent more money but only one can win the title.
"It's not just the consequence of the money they spend in how successful you are.
"That is why you have to keep your nerve and not buy just because the others buy – but buy because you have found a player that can really give you a plus."