Paris: Rafael Nadal admitted Monday that he is becoming increasingly frustrated with speculation over whether or not a back injury will shatter his hopes of a ninth French Open title.
The Spaniard, who turns 28 on Tuesday, turned on the media for their obsession with the state of his back which most famously flared up in his Australian Open final defeat to Stan Wawrinka in January.
"My back can be pretty unpredictable," the world number one said after demolishing Serbia`s Dusan Lajovic 6-1, 6-2, 6-1 to reach the quarter-finals at Roland Garros.
"In Australia I felt some pain, and here in Paris I try to co-exist with this pain. But sometimes it changes. I`m not lying. It`s totally unpredictable. I don`t want to speak too much about it anyway."
However, the questions are unlikely to stop for a man whose career has been at the mercy of injuries with the Spanish star frequently dogged by knee problems which have slammed the brakes on his efforts to add to his 13 majors.
Nadal next faces compatriot David Ferrer against whom he has a 21-6 winning record.
The world number one beat the 32-year-old in a one-sided final in Paris 12 months ago but lost to his Davis Cup teammate in the Monte Carlo Masters quarter-finals in April.
Nadal says he is unconcerned by that result as well as the baggage associated with his spectacular Roland Garros record where he has eight titles, 63 match wins and just one loss to Robin Soderling in the fourth round in 2009.
He will only reflect on his achievements in his dotage when he is fishing or playing golf in his beloved Mallorca.
"The past is not helping me to win no one point. That`s it. The sport is the present, and I`m thinking about what`s going on today, what`s going on tomorrow, my practice, and the day after tomorrow in my match," said Nadal.
"Then hopefully after my career I will have chances to think about all the things that happened in the past."
On Monday, Nadal needed just 93 minutes to see off world 83 Lajovic with the Serb claiming a paltry 15 points off the champion`s serve.
With US rocker Prince, who played a concert in the French capital on Sunday night, looking on from the stands, Lajovic at least had the consolation of avoiding the worst Roland Garros drubbing handed out by Nadal.
That unwanted record belongs to Argentina`s Juan Monaco who won just two games in a fourth round drubbing in 2012.