[caption id="attachment_5082" align="alignnone" width="580"]Nadal survives at the India Wells. Image Source: File Pic Nadal survives at the India Wells. Image Source: File Pic[/caption] Internet Desk: Spanish star Rafael Nadal and world number one Novak Djokovic remained on course for a mouth-watering Indian Wells semi-final while Swiss Stan Wawrinka exited Wednesday in a match he described as a no-brainer.

World number 5 Nadal survived a scare from Alexander Zverev, rallying to beat the German teenager 6-7 (8/10), 6-0, 7-5 and reach the quarter-finals.

Two-time defending champion Djokovic cruised into the quarters by beating Feliciano Lopez 6-3, 6-3 but French Open champion Stan Wawrinka bit the dust in joint ATP and WTA Tour tournament.

Nadal, who saved a match point in the third set, said he had to adjust quickly to 18-year-old Zverev's style, especially the German's second serve, which he consistently blasts at speeds of 120 mph.

Indeed, Zverev had the 14-time Grand Slam champion Nadal on the ropes for much of Wednesday's two and a half hour contest and following the match the Spaniard predicted great things for the teen.

The contest on the main stadium court in front of a crowd of about 10,000 turned on match point in the ninth game with Zverev serving and leading 5-3 in games.

Up 40-30, the German then made three straight unforced errors to hand the game to Nadal.

The nine-time French Open winner Nadal then used his experience to seize control and win the final 3 games and close out the match.

Nadal moves on to face Kei Nishikori of Japan, who rallied to beat American John Isner 1-6, 7-6 (7/2), 7-6 (7/5).