INDIANAPOLIS, IN - AUGUST 15:  Valentino Rossi of Italy and Yamaha Factory Racing  speaks during the press conference pre-event during the MotoGp Red Bull U.S. Indianapolis Grand Prix - Previews at Indianapolis Motor Speedway on August 15, 2013 in Indianapolis, Indiana.

Photo Credit: Mirco Lazzari gp/Bongarts/Getty Images

The world championship is still wide open with rookie sensation facing a big fight with fellow Spaniards and .

That’s according to seven-time world champion , who reckons Marquez is not guaranteed the title despite his clean sweep of the American races this season.

Marquez completed his triple play of US wins with victory in last Sunday’s Indianapolis Grand Prix which followed victories in Austin, Texas, and at Laguna Seca in California.

Marquez now leads the championship by 21 points over Pedrosa and is 35 clear of defending champion Lorenzo after 10 of 18 rounds.

The next race, the Czech Grand Prix, is this Sunday (Aug. 25) at the Brno Circuit.

Marquez has won four of 10 races so far this season, including the German GP, although three of his wins have come while Pedrosa and Lorenzo have been recovering from painful collarbone injuries.

Rossi believes that his Yamaha teammate Lorenzo, who was third at Indy after being slowed by loss of rear grip in the final laps, is in the hunt to defend his 2012 championship crown.

“Marquez was very impressive the whole weekend at Indy,” Rossi said.

“For the championship he has won three races in a row, so I take my hat off to him.

“But Jorge made a fantastic job (at Indy). He tried very hard and rode like a devil.

“We know this track is difficult for Yamaha, so I don’t think the championship is finished yet.”

Lorenzo was baffled by the tire issues which he said contributed to him conceding second-place to Honda rider Pedrosa just three laps from the finish at Indy.

While admitting that victory against flying rookie Marquez was almost impossible, Lorenzo was hugely disappointed to miss second-place after leading for 13 of 27 laps.

“When Marc passed me, I remained for four laps quite fast but then the rear tire started to drop but in a big, big way,” Lorenzo said.

“And then suddenly, five laps before the end, it made another big drop and I had to reduce my speed a lot, especially in the right corners. It was unbelievable.

“I don’t know what happened; maybe I pushed too much at the beginning to fight with the Hondas.

“I’m disappointed not because I didn’t win the race — this was almost impossible — but because I lost second-place, which was virtually assured for me.

“I could not defend second-place without taking very high risks.”

Lorenzo has won three of 10 races and, despite the positive support of Rossi, he faces tough task to overhaul Marquez who, at just 20, continues to blaze a path toward winning the MotoGP championship in his first attempt.

Tags: , , , , ,