They are two of the greatest male triathletes ever and will go head to head once again at the ITU World Triathlon Series San Diego this weekend.

The second round of the ITU World Triathlon Series touches down where it all started in the birthplace of triathlon in San Diego this weekend with some of the top names set to compete.

World champion Jonathan Brownlee will miss the San Diego World Triathlon Series event on April 20 due to an ankle injury.

The first ITU World Triathlon Series races of 2013 showed that Javier Gomez and Anne Haug are the ones to beat this year, but Auckland also threw up more intruiging performances beyond just the podium. We take a look at them here.

The first ITU World Triathlon Series race in 2013 played out exactly how the season finished last year, with Javier Gomez and Anne Haug on top. Here we recap all the social media stories of the race weekend.

The racing continued here in Auckland on Sunday morning as the age group athletes got their chance to compete in either a sprint distance or Olympic distance event as individuals or teams.

Germany's Anne Haug started 2013 where she left off in 2012 in the ITU World Triathlon Series in Auckland, blasting away from the Netherlands Maaike Caelers and Australia's Felicity Abram to record her third consecutive ITU win.

Spain's Javier Gomez continued his unbeaten record in Auckland today, claiming victory in the opening round of the ITU World Triathlon Series Grand Final ahead of fellow countryman Mario Mola and Portugal's Joao Silva.

Watch the 2013 ITU World Triathlon series season opener in Auckland.

We begin the 2013 series the way we finished, in Auckland, New Zealand. A panel of athletes shared their thoughts for this weekend’s racing with members of the media today ahead of the 2013 Barfoot & Thomson ITU World Triathlon Series.