Guibert who of course is involved in the sport through such players as Novak Djokovic and Daniil Medvedev wearing his brand posted in praise of Sinner: "Hats off to Jannik Sinner for his win tonight, despite the unfair behaviour of Tsitsipas, he showed to everyone why he is a future champ and an authentic guy."
"Can always trust La Gazzetta dello Sport not to overreact": Italian newspaper posts bizarre depiction of Novak Djokovic crowning Jannik Sinner after ATP Finals loss
Murray puzzled by Lacoste CEO's tweet
To which Murray responded on Friday morning: "Bizarre post from a CEO of a sports brand. Getting injured is part of sport and isn't unfair behaviour". Many under his original tweet believed that the criticism towards Tsitsipas was unfair.
The Greek played his opening match of the ATP Finals, but then withdrew only games in against Holger Rune leaving to an ATP Finals fracas as Taylor Fritz had to take to the court to play an exhibition injured. Hubert Hurkacz then replaced him for the final group game against Novak Djokovic.
But some took the line that Tsitsipas was only there to collect his pay check which is what Guibert seems to be heading down similar lines with his thinking.