"I've never been the sole leader, it's good. It's not easy to play at the top and you don't want to lose your spot," he told Cadena COPE.
"Going on to the field we push ourselves to the physical, mental limit and don't enjoy it. The pressure to win takes its toll. Physically, we're holding up well.
"We're playing at a very high level. We're here and the future looks bright."
Atletico are in Copa del Rey semi-final action against Real Madrid at the Bernabeu on Wednesday evening.