Ireland's Arthur Lanigan O'Keeffe has left himself with a lot of work to do ahead of Saturday’s men’s modern pentathlon.

He lies in 25th position after today’s fencing rankings round with a record of 16 wins and 19 defeats at the end of the 35 contests.

The 24-year-old Kilkenny man started off brilliantly and was on top of the leaderboard at one stage with a 5-1 record, but he couldn’t maintain his run.

The main men's competition takes place on Saturday, when there will be further fencing, showjumping, swimming, running and shooting before the medals are decided.

Lanigan O'Keeffe came into these Games as a real medal prospect - only Europeans have ever taken gold in the men's event and he is current European champion.

Earlier, Natalya Coyle finished her ranking round in 12th position, with the main competition to follow tomorrow.

The higher the athlete finishes in the ranking round, the better chance they have of picking up points in the main event.