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.

Tuesday Morning Sports Update
All Ireland Football Championship Opening Round Fixtures Confirmed
Tommy O'Brien Among Injury Doubts For Leinster's Champion Cup Final On Saturday
Monday Morning Sports Update
Sunday Evening Sports Update
Mourinho's Benefica Go Unbeaten but Miss Title
Brave Kildare Fall Short in Leinster Ladies Final
Chelsea Appoint Xabi Alonso as New Manager