Former world champion Damon Hill says Michael Schumacher's decision to retire at the end of the season is "brave".
Hill and Schumacher used to be fierce rivals on the track
Schumacher won his first world title in 1994 at Hill's expense, after a clash forced them both off the track at the Australian Grand Prix.
"It's a brave decision to stop doing something he loves," Hill said.
"We sort of know how he'll be remembered but over time his successes will mark an era when his dedication to winning gave the championship colour."
Hill, who won the title in 1996, retired from competitive racing in 1999 at the age of 39.
Schumacher is 37 and hopes to secure an eighth world title before he retires, and Hill said the fact he was quitting could give him the edge on his title rivals.
"I think he'll be doubly motivated to win the championship," he said.
"He's certainly capable of winning races. I think it's hard to give that up. I think he's doing the right thing for himself."