Rafael Nadal could emulate his great rival, Roger Federer, by completing his 'amazing' comeback from injury at the Australian Open, according to John McEnroe. Nadal was forced into five gruelling sets by Denis Shapovalov, but the 20-time Grand Slam champion ultimately showed the greater desire to outlast his doughty opponent and sealed his place in his 36th major semi-final in four hours and 10 minutes. Ad/> The Spanish star is now through to the semi-finals at Melbourne Park for the seventh time in his illustrious career after battling past the Canadian, 6-3 6-4 4-6 3-6 6-3, despite being ranted at for time-wasting by his opponent in a fiery exchange which involved the umpire being accused of being «corrupt».