Dramatic London Triathlon for Brownlee

Jonny Brownlee insists there has been no power shift in triathlon's foremost family despite his silver medal in London and brother Alistair's dramatic collapse.

Alistair went into the race as the hot favourite having won all six of the previous World Championship Series races he had entered while Jonny was a junior trying to make his mark on the biggest stage.

Alistair dominated the WCS last season, romping to the world title, while he had shown he was fully recovered from the femoral stress fracture he suffered at the start of this year by winning on his return in Madrid last month and then emphatically taking gold at the European Championships.

All appeared to be going well in Hyde Park as the 22-year-old emerged first from the swim despite losing his goggles and then stayed near the front on the ride before pushing the pace on the run.

Only his brother and Spain's Javier Gomez could live with him but his earlier exertions clearly took their toll and, when his great rival Gomez kicked, the world champion could not respond.

While Jonny continued in pursuit of the Spaniard, Alistair struggled before eventually staggering across the line in tenth place before being rushed to the medical tent.

Reports quickly confirmed it was nothing more than exhaustion but Jonny was not the only one to react with shock that he was the Brownlee taking to the podium.

The 20-year-old, though, has no doubt his brother will return stronger than ever at the next race in Kitzbuhel in three weeks' time.

"I felt sorry for Alistair because he's a great champion but these things happen," Jonny said.

"Maybe he'd eaten something wrong. Small percentages can make a massive difference.

"He's an incredible athlete my brother, he hasn't got a weakness at all and he's so tough. When he's tired he gets good training sessions out as well.

"He's still better than me but he had an unfortunate race and it happens. I had a really good day and he had a bit of bad luck."