# Tennis: Former US Open champion Juan Martin del Potro fought back the tears as he revealed over the weekend his comeback this week after two and a half years of injury is more a farewell than a return to the game. Del Potro is set to announce his retirement after he plays at the Argentina Open in Buenos Aires. It is his first tournament since fracturing his kneecap in June 2019 at Queen’s in London. The former world number three has undergone four operations on his knee.