Coleraine man Alan Campbell easily won his repechage in the heavyweight single scull at the World Rowing Championships to qualify for the semi-finals.
Alan Campbell won this year's World Cup series
Campbell won the World Cup series this year and has been strongly tipped to secure a medal at Eton.
The 25-year-old said on Tuesday that he had opted not to race hard in Sunday's first round after picking up a cold.
"My coach and I decided not to risk it in the first round and go for the repechage," said Campbell.
"My World Championship starts here. I feel the same as I would do after any race and I'm near my optimum level of performance.
"I demonstrated that I mean business, even if it was not the most difficult race I have ever had."
Campbell has already claimed the scalp of ex-world champion Marcel Hacker this season but will take on Norway's Olaf Tufte, the reigning Olympic champion, plus Ondrej Synek of the Czech Republic and Holland's Sjoerd Hamburger in Thursday's semi-finals.
I will definitely lay down a marker to make sure I get to the A-final
"Sjoerd Hamburger is definitely one to look out for, he's raced me close this season. But I'm feeling like a caged tiger and I can't wait now.
"The semi-finals can sometimes turn out to be the biggest races of the competition.
"Nobody will hold back but I will definitely lay down a marker to make sure I get to the A-final."
Another Coleraine man Richard Chambers and his partner Chris Bartley won their lightweight pairs heat on Monday.
Chambers and Bartley won the world under-23 title last month and are aiming to at least qualify for the final in Eton.
However, Richard Archibald and his Irish lightweight four team-mates were surprisingly beaten in their opening heat on Monday and they will have to go down the repechage route on Wednesday.
Archibald, Gearoid Towey, Eugene Coakley and Paul Griffin won this year's World Cup series and had been favourites to win their heat on Monday.
However, last year's World Championship silver medallists finished over three seconds adrift of the Chinese boat.
The Irish men's heavyweight four of Cormac Folan, Sean O'Neill, Sean Casey and Alan Martin qualified for Thursday's semi-finals of their event by finishing second in their repechage, behind France, in a time of 5.58.21 on Tuesday.
Both Ireland's heavyweight single scullers Caroline Ryan and Sean Jacob missed out on semi-finals spots by finishing fourth in their respective repechages on Tuesday morning.