He looked like a shadow of his old self as he walked on to centre court carrying his back and burdens all on his own.

There was no one in his technical area for the first one hour until Andre Agassi walked in one hour later to his amazement and delight.

Djokovic struggled to beat unseeded Diego Schwartzman 5-7, 6-3, 3-6, 6-1, 6-1 to reach the fourth round of Roland Garros and his fans were not pleased.

Speaking after the game, he thanked his fans for hanging in and spoke on his none formal transaction with Agassi.

“He was not supposed to be here today, because we finished yesterday with our in-person collaboration here in Paris. He had many different things that he was supposed to do. He’s doing that.

He managed to reschedule certain things and show up today, which was not planned. I appreciate that.”

Further asked about Agassi’s earlier statement on Eurosport that he was doing the gig for nothing, Djokovic said: “I’m not going to get into that but everything he said is completely true, so it’s completely his decision.

"I hope that’s going to stay for a long time that we can create something that is going to go long term. We don’t have anything set in stone.

"We had a great chat after the match. He’s going to try his best to be in the biggest tournaments with me as much as his family time allows and all the commitments that he has.”

Djokovic, world number 2, is still on course to set up a potential heavy weight clash with tournament favourite, Rafael Nadal.