F.C. Barcelona training session [Getty Images]

BARCELONA, SPAIN - SEPTEMBER 12: The F.C. Barcelona forwards, Lionel Messi and Neymar Jr., jogging during the training session at the Sports Center FC Barcelona Joan Gamper, before the Champions League match between F.C.Barcelona and Celtic FC, on September 12, 2016 in Barcelona, Spain. (Photo by Joan Cros Garcia/Corbis via Getty Images)

Corbis Sport Joan Cros Garcia - Corbis