Rory McIlroy says pressure in sport is leading to increase in stress - relates illnesses . England captain Jonathan Trott quit the Ashes series this week citing a stress - related illness . McIlroy says it shows the mental toll sport can take on athletes . The Northern Irishman was suspended ahead of this week 's Australian Open in Sydney .
Rory McIlroy says pressure in sports is leading to increase in stress-relates illnesses . England cricketer Jonathan Trott left the Ashes series this week citing a stress-related illness . McIlroy says it shows the mental toll sport can take on athletes . The Northern Irishman was speaking ahead of this week 's Australian Open in Sydney .