Pini will be competing in the 100m butterfly on day 2 this morning at the BSP Arena.
There are three heats in this event. Pini will race in heat three lane four.
The top eight in the three heats will qualify for the finals this evening.
Swimmers have just completed their warm ups as the crowd starts to build up.
Other events today are the women 50m backstroke and 200m freestyle, men 400m medley and women 200m breaststroke.