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Frankel is unbeatable and will end his career on a winning note, says top jockey Frankie Dettori.

The undefeated four-year-old colt, the world's top-rated horse, is expected to race for the final time in the Champion Stakes at Ascot on Saturday.

"The competition is very strong, but I can see it being another walk in the park for Frankel. He's a true champion," Dettori told 91�ȱ� Sport.

Dettori rides one of his opponents, Pastorius, as Frankel seeks a 14th win.

The German Derby winner Pastorius, last year's Champion Stakes victor Cirrus Des Aigles, Nathaniel, likely pacemaker Bullet Train and Master of Hounds are the five horses who stand between Frankel and another victory before he is retired to stud.

Dettori has finished behind the Sir Henry Cecil-trained champion eight times, losing by an aggregate distance of more than 104 lengths.

"I haven't seen his face; I only see his backside. But even if you do get beat, you have to admire him and clap him. I'm a sportsman and I really appreciate him being around," said the Italian.

"We have been blessed. I've been riding 25 years. We've seen some great horses and he's one of them. What he has done in our sport is fantastic.

"His style of racing detaches him from a normal horse. He destroys the field by a big distance and has never let anyone down.

"He's like Usain Bolt - a true athlete. When he gets on the track, he just blitzes everything else."

Dettori, famous for his magnificent seven winners at Ascot in September 1996, said he had congratulated friend Richard Hughes on Monday after the jockey emulated his seven-timer at Windsor.

"To win seven in one day is absolutely amazing. It's a great achievement," he said.

Now aged 41, Dettori has dismissed suggestions he might retire and said he "absolutely" hoped to continue for several years with Sheikh Mohammed's Godolphin team despite speculation about a move.

"My target is 50, then we'll see. It is a dangerous sport and when you fall, you get hurt, but touch wood I have been quite lucky and let's hope it carries on that way. There's plenty of good racing in me," he said.

Dettori, who had his first booking in seven years for Godolphin's rivals Ballydoyle when he rode Camelot in the Prix de l'Arc de Triomphe earlier this month, said he was unsure if he would team up with the Irish stable again.

"It was a great honour to be offered the ride and I didn't have anything in the race. Unfortunately the horse didn't win. Who knows what the future holds?" he said.

The £1.3m Champion Stakes, featuring Frankel, is Europe's most valuable mile-and-a-quarter race and the highlight of British Champions Day - the richest day in British racing.

Dettori nominated Colour Vision in the Long Distance Cup as his best chance of a winner on Saturday.

"Colour Vision has been very consistent and won the Gold Cup at Ascot. Let's hope he reproduces his form," he said.