MotoGP: Marc Marquez can dominate like no other rider

For the next five or six years we could see a domination of MotoGP like we have never seen before.

Marc Marquez won his fourth straight race at Brno on Sunday - his fifth of the season - and I just don't think there is any stopping him.

The first half of the season was the point I felt would be vulnerable for the 20-year-old, but he seems to have tamed the beast that is his Repsol Honda bike and he is using his head. He is really smart about what he does.

He is a really old head on very young shoulders and the key to his stunning form is that he has such raw speed and tremendous ability.

In Brno he did not really push too hard in the first few laps, he let the bike get up to temperature and then just got his head down, closed down the leaders and got past with about four laps to go and went on to win it.

There is no doubt that Dani Pedrosa, Jorge Lorenzo and Valentino Rossi - who I call the old stalwarts - will be wondering what they have to do to beat this kid, because even if he crashes it does not stop him.

I think one of the reasons we have seen Pedrosa and Lorenzo crash out and hurt themselves this year is because they are tying to pick the pace up and be as fast as the kid who has never done it before.

It is like the new kid turning up at school and being smarter than anyone else and everyone has to pick their game up. The bar has been lifted and the others are having to step up to the plate.

We saw the sheer speed he has in his first race at the start of the season in Qatar, but what we have now is someone who thinks about what he is doing.

He doesn't seem to be so hurried, he lets thing settle down and the beauty of that from his point of view is that he knows that as the race unfolds, he has the speed to catch the leader and reel them back in again, as he did with Lorenzo on Sunday.

He has a 26-point lead and he is perhaps going to need to start thinking about the championship - rather than pushing for a race win, maybe he will need to ride for a second or third. You can't afford to take too many risks and crash out.

But unless someone makes a big breakthrough, Marquez will win the championship. I don't think Pedrosa can win it now because he is on the same equipment.

This season, in my opinion, was Pedrosa's best chance to win the title.

I had him down as the winner at the start of the year, but at that stage I hadn't factored in the speed and consistency of Marquez.

It is eight seasons on a factory bike without a championship for Pedrosa, and there are many reasons why it has eluded him - bad luck with injuries, wrong time, wrong place and too many fast guys in front of him - it seems he is always going to be the bridesmaid.

But he is not the only one who is suffering because of Marquez's superb form.

Yamaha will have to have something up their sleeve as far as improving their bike if they are to deny Marquez the championship, and I know Lorenzo and Rossi have been pleading with Yamaha to bring some new components and modifications through to help them do that.

But, in truth, the only thing I can see stopping Marquez is an injury. It is very easy to break a wrist or a leg and put yourself out of a couple of races; that is the downside of motorcycle racing, you are so vulnerable.

While things just get better for Marquez, there was disappointment for Cal Crutchlow at Brno.

He started on pole but didn't get a tremendously good start and that is where he is losing out. He crashed out and ultimately that came because he dropped back at the start and was then trying to bridge the gap to the leaders.

To do that you have to go faster than the three fastest guys in the world - that is like tightrope walking on cotton and unfortunately the cotton broke for Crutchlow.

He has to get his bike to come to him in the early part of the race because you cannot afford to give away two or three seconds, but I think that crash will make him a bit more fired up for the British Grand Prix next weekend.

Can he win his home race? I wouldn't say it's out of the question, especially with the motivation of 70,000 or 80,000 British fans screaming his name.

It is sure to be a thrilling race.

Steve Parrish was talking to BBC Sport's Gary Rose