Derek McGee edged out Paul Jordan in a photo finish after a fiery opening Supersport encounter at the Armoy Road Races on Friday evening.
The pair collided after the race had ended, resulting in a red flag. Jordan was initially called the winner but it was McGee who got the official verdict by only 0.012 seconds.
Some words were exchanged and Jordan did not take his place on the rostrum afterwards.
McGee led for most of the race with Jordan breathing down his neck as they battled it out around the undulating three-mile course.
Magherafelt man Jordan, who won the corresponding race in 2018 after an epic shootout with Adam McLean, left himself with plenty of work to do following a less than perfect start.
Pole-sitter Jordan was lying fourth on the opening lap but soon began to make headway on his 600 Yamaha after Derek Sheils and McGee set the pace on lap one, with the returning Michael Dunlop in fifth.
Sheils slid out unhurt on the Roadhouse Macau Yamaha, leaving Jordan to take the fight to McGee as the duo were chased by Dunlop and Sweeney.
A grandstand finish was in store and just as he did last year, Jordan attempted a slipstreaming move on the final run to the line, but this time he was denied victory by the narrowest of margins.
Sweeney filled the final rostrum place on his MJR Yamaha ahead of Dunlop (MD Racing Honda) as less than one second covered the top four.
Darryl Tweed and Mike Browne completed the top six, with Dominic Herbertson in seventh on the Davies Motorsport Kawasaki ahead of newcomer Sam West.
The Senior Support race was won by Tommy Henry from Ryan Fenton and Andy McAllister.
Roads close on Saturday from 10am for the main programme, including the feature ‘Race of Legends’.