AP McCoy's fellow sportsmen took to Twitter to congratulate the jockey on his landmark 4,000th career win.
Former Liverpool striker Robbie Fowler, Irish golfer Shane Lowry and ex-England rugby union captain Matt Dawson were among those to pay tribute to the record-breaking rider also known as Tony McCoy:
Jockey AP McCoy has won his 4,000th race, riding Mountain Tunes to victory in the 1510 at Towcester.
Record-breaking jockey Tony McCoy is one victory away from 4,000 wins and could reach that astonishing milestone today.
The 18-time champion jockey moved to 3,999 wins after winning on Minella For Steak at Chepstow yesterday.
The Northern Irishman has two rides at Towcester today where he could reach the unprecedented landmark.
McCoy will ride Church Field at 2.10pm which is the 3/1 favourite and Mountain Tunes an hour later which is also the favourite at 6/4.
Record-breaking jockey Tony McCoy will not reach 4,000 race wins today after failing to win the first two of his three rides in Exeter.
However, our sports correspondent Ian Payne said: "Such is the relentless nature of horse racing, McCoy could reach that milestone tomorrow at Chepstow where he has a couple more rides.
"He is a total phenomenon, he's won the championship for jockeys 18 times and he is going for his 19th this year."
The 18-time champion jockey finished second on his opening race on Flemenson, seventh on Keen Eye in his second ride and has one more race at Exeter today.
Record-breaking jockey Tony McCoy, who is only two race wins short of reaching an astonishing 4,000 jump victories, downplayed his chances of completing that feat at Exeter today.
The Northern Irishman, who has three rides at Exeter, told the Guardian he had "bits of chances" to complete that milestone today.
He said: "I wouldn't say they're good chances. Flemenson won at Uttoxeter the last day, he's probably my best chance. Well Hello There fell last time and I think the one in the hurdle is probably not much good."
McCoy currently has 3,998 victories over his 18-year career and his first race starts at 1.50pm today, followed by another at 2.20pm and the last at 3.50pm.
Jockey Tony McCoy is just two wins away from a landmark 4,000 wins. He could reach that magical figure at Exeter Racecourse today.Read the full story ›
Racing pundit John McCririck was dumped by Channel 4 because he was "alienating" and "offensive", an employment tribunal heard.Read the full story ›
Flamboyant racing pundit John McCririck was dumped from a high-profile role on Channel 4 because he was "alienating" and "very offensive", an employment tribunal has been told.
Jay Hunt, Channel 4's chief creative officer, said a talent tracker study on how he went down with audiences was "one of the worst pieces of research I have ever seen regarding a presenter".
McCririck, 73, who was dropped from Channel 4's revamped on-screen line-up, is accusing his former employers of age discrimination.
Ms Hunt said the audience research on him was "one of the most dispiriting" documents she had seen.
John McCririck has described the ongoing employment tribunal over his dismissal as Channel 4's horse racing pundit as a "daunting ordeal" and admitted he faced a "tough battle" to win the case.
A TV executive has denied claims by racing presenter John McCririck that she was a "serial age discrimination offender".
Jay Hunt, Channel 4's chief creative officer, told an employment tribunal she felt there was "no correlation" between younger presenters drawing younger audiences.
She added that claims by McCririck, who says he was sacked by the channel because of his age, were "untrue".
Hunt was at the BBC when presenter Miriam O'Reilly won an age discrimination case against the corporation after she was dropped from the Countryfile programme.
"Contrary to what John McCririck says, I have learnt from that case," Hunt told the tribunal.