Southampton boss Mauricio Pochettino admits he and Chelsea counterpart Jose Mourinho are good friends.
While Mourinho was in charge of former club Real Madrid he came across Pochettino's Espanyol side on four occasions and enjoyed four wins - seeing his side score 13 goals and keep a clean sheet in every match.
"My relationship with Jose is excellent," said the Argentinian.
"We get along very well. I have a great admiration and respect for him as a football manager and as a person and it will be great to say hello to him on Sunday and to have the game against him.
"I'm happy to be facing Jose Mourinho in England, and not in Spain. It's clear that you learn from everyone, but I've learnt a lot from Jose.
"I think he's one of the best managers in football history. His record speaks for itself. We have a very good relationship, but at the same time while before and after the games we will be friends, during the full 90 minutes we're not going to be friends, we're just going to be rivals, opponents."
