The 2018 Australian Open tennis tournament just concluded with Roger Federer winning his 20th grand slam, extending his already fantastic grand slam record. Is it even possible for current world number one Rafael Nadal to reach him with his current tally of 16 grand slam titles? Photo: Brett Marlow, CC BY And all of us already know that superstar Rafael Nadal had to retire early due to pain in his upper right leg in the fifth set of his quarterfinal match against Marin Cilic (3-6, 6-3, 6-7 (7-5), 6-2, 2-0, retired). Afterwards, Nadal regretfully lamented, “Tough moments — not [for] the …
