"Yeah, I think you can see that is a fact," said Ruben when asked if his squad are tougher than last season.
"Because you can see with the data. Then, with confidence sometimes you react a little bit sooner and you are near the ball.
"Again, against Arsenal we were sometimes building up but we had to kick the ball, and you could see the reaction of the players in the second balls — the duels — we are stronger, we are recovering our positions faster.