LONDON, July 5 : Defending champion Jannik Sinner delivered another assured display at this year's Wimbledon by brushing aside Japanese qualifier Shintaro Mochizuki 6-3 7-6(0) 6-3 to reach the quarter-finals on Sunday.Sinner arrived in southwest London without any grasscourt match practice after his early French Open exit in late May, but the 24-year-old Italian has steadily rediscovered his footing on the sport's slickest surface after a difficult opener."It's the first time we've played against (each other), so I didn't know exactly what to expect, but I tried to handle certain situations slightly better than him," Sinner said of his unorthodox and energetic opponent."He's an incredible player. Coming from the qualifiers and playing such a high level for such a long time. It's amazing. I