Wiffen competes at World Aquatics Championships at 12 noon Irish time
Daniel Wiffen will bid to defend his men's 800-metres freestyle title at the World Aquatics Championships in Singapore today.
The Olympic champion is back in the pool shortly after 12pm Irish time.
Danielle Hill competes in the semi-finals of the 50-metre backstroke later, while Ellen Walshe returns for the 200-metre butterfly semi-finals.

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