Great Britain wheelchair racer David Weir has announced his intention to retire from the sport after the Rio Paralympics.

The 37-year-old still has two more chances to win a seventh title at the Games, having already finished fifth in the 400m and fourth in the 1500m events.

Weir will play no part in Tokyo 2020, however, as he plans to call time on his successful career after next April's London Marathon, where he will aim to become the most-successful ever competitor with a seventh crown on home soil.

"That's my last [individual] race on the track ever," he told Channel 4. "That will be it for me. That was my decision before I came out here. I was thinking about it hard with my team around me and I said this is my last track event I can do.

"And I said I want to retire at the London Marathon next year. I'll give it one more winter's training and bow out where it all started."

Weir's decision to retire after the London Marathon means that he will not compete in the IPC Athletics World Championships at the scene of his London 2012 successes at the newly-named London Stadium.