Looks real to me, his son's is real and he refers to that one, so that's all the proof I need. He just needs to get mentioned a few times by PMac and some of the journos/players, then more people would follow him.
Best twitter posts of the epic match:
@dougrobson - Whoever is supplying Mahut with hair gel needs to ink a sponsorship deal now.
@Wimbledon - FYI, with @Wimbledon live scoring devices, please add 50 to the games in the fifth set of the Isner v Mahut match.
@HolterMedia - Nice to see that a three-day test has come to tennis here @wimbledon.
The Golden Era of Novak: Australian Open * Dubai * Indian Wells * Miami * Belgrade * Madrid * Rome * Wimbledon * Montreal * US Open * Abu Dhabi * Australian Open * Miami * Toronto * China * Shanghai * World Tour Finals 2012 * Australian Open 2013 * Dubai * Montecarlo * Beijing * Shanghai * Paris * WTF * Indian Wells * Miami * Rome * WIMBLEDON 2014
Federer to Nole: "Amazing year. Amazing tournament. Amazing match. You are THE BEST!"