The worlds of tennis and padel have officially collided as Carlos Alcaraz walked into a sold-out padel tournament in Marbella. The world No. 1 in tennis and four-time Grand Slam champion made an unannounced appearance Thursday at the opening day of Reserve Cup Marbella Presented by Sierra Blanca Estates at Puente Romano Marbella — and the reaction was exactly what you would expect when one of the most recognized athletes on the planet arrives in his home country of…

