Gilles and Gael are great friends and have grown up together. This article is from a while back but they still talk about each other the same way.
"Gilles Simon adores Gaël Monfils who is himself a huge fan of Gilles Simon. It's a real friendship, not just one created to look great in the media. It wasn't faked when Gaël Monfils gave Gilles Simon a big cuddle in the corridor of the locker rooms yesterday to congratulate him to have joined him in the 4th round. The fact that Gilles Simon was his next opponent wasn't going to hold back his surge of affection. "And one second later they were teasing each other like little brats", Tulasne says with delight. It's the story of a friendship marked by humour which started when they were kids. Monfils was wearing big round glasses and kept challenging Simon, by 2 years his senior, to matches although he got a beatdown everytime. Simon was a puny boy (Gaël: "so short, so skinny"), amused by the nerve of the greenhorn. The two friends will face each other for the first time on the tour today. He who laughs last laughs longest..."
The headline is Gaël: "Gilles is my 'chouchou'" - Gilles: "Gaël is a great guy"
chouchou means something like "my pet" or "my darling"