No, they aren’t two images of Gael Monfils. The guy on the left is Gianni Mina, an emerging French tennis player born in Guadeloupe. I am sure you are tempted to think ( like I was initially) that Mina is the product of a clandestine cloning project being run by the French.
That cannot be the case. If the French could clone so well, then they would have first made replicas of Zinedine Zidane and Thierry Henry and not Gael Monfils.