INDIA, Jan. 28 -- We are still some time away from seeing a possible Roger Federer vs Novak Djokovic battle on the tennis court in the ongoing Australian Open 2020 but the two stalwarts of the sport won several hearts on social media with their adorable gesture towards a young girl fan who had hurt her leg.In a video shared by the official Twitter account of ATP Tour, both Djokovic and Federer were spotted seen signing the cast of the young girl who was on wheelchair having hurt her left leg. It wasn't just the World No. 2 and World No. 3 men's singles players who signed the girl's cast. Earlier, World No. 1 Rafael Nadal had also done the same. "I will sign next to Rafa (Rafael Nadal)," Federer was heard saying on the video shared by ATP To...