Wimbledon: Alcaraz, Murray battle to win; Collins biggest casualty of Day 1

Six-time champion and top seed Djokovic saw off South Korea's Kwon Soo-woo in four sets. Meanwhile, Alcaraz, a potential quarter-final opponent for Djokovic, came back from two sets to one down to defeat Jan-Lennard Struff. Australian Open finalist Danielle Collins was knocked out by Marie Bouzkova.