Conor McDermottroe, a member of Trinity's rifle club, competed in the 50-metre prone event in South Korea.
In the inaugural Ronnie Coates memorial race, Trinity student Seán Owens finished first.
Fiona Tuite and Linda Djougang, both members of DUFC Women, faced off against each other on Friday night as Leinster overcame Ulster 17-0.
A disastrous first half left DUFC with too much to do in their Leinster League opener against Old Belvedere.
After ultimately disappointing seasons last year, DUHC and DULHC will both be hunting for promotions this season.
After losing some key players, the camogs hope to build on the foundations laid over the past year.
Hopkins won out in a race that included Olympic medalists and the current world champion.
Doherty won a silver medal in the 100m hurdle event, with a time of 13.72 seconds.
DUBC said Van Mesdag was 'one of our most successful oarsmen of all time'.
Daniel O’Neill and Luke Maguire played out a mammoth 60-hour doubles match at the weekend.