WATCH: Amazing brotherly love as Alistair Brownlee helps Jonny over the line

Jonny was on to win the title.

Over the weekend a true sign of brotherly love was witnessed between the Brownlee brothers.

Olympic medalists Alistair and Jonny Brownlee were taking part the World Triathlon Series in Mexico when Jonny found himself beginning to weave over the road in hot and humid conditions.

Jonny, who was comfortably leading at the time stopped at the side of the road. As brother Alistair who was in third approached he decided to put his arm around his exhausted brother and walk him the final few hundred metres across the line; eventually pushing him across the line.

It wasn't all sympathy from Alistair who later joked, "I wish the flipping idiot had just paced it right and won the race. He could have jogged the last 2km."

Jonny Brownlee | © Getty Images

Jonny required immediate medical attention after the race, but later tweeted from his hospital bed saying, "Not how I wanted to end the season, but gave it everything."

Both brothers won medals in the Rio Olympics this year.