QUITO, June 25 (Reuters) - Ecuadorean champions LDU stunned Fluminense by firing four first-half goals on their way to a 4-2 win in the first leg of South America's Libertadores Cup final on Wednesday.
Claudio Bieler gave LDU a flying start by scoring in the second minute before Dario Conca replied for the Brazilians, who started the game as hot favourites to win the tournament for the first time.
Joffre Guerron, Jairo Campos and Patricio Urrutia scored in a 20-minute spell before halftime but Fluminense fought back with a Thiago Neves goal early in the second half to keep themselves alive.
The second leg will be played in Rio de Janeiro on July 2.
LDU, attempting to become the first Ecuadorean team to win the trophy, went ahead when Bieler beat his marker to Guerron's low cross and slid the ball home.
Fluminense, who knocked out Sao Paulo in the quarter-finals and defending champions Boca Juniors in the semis, levelled when Conca curled a 30-metre free kick into the top corner.
LDU regained the lead in the 28th minute when, following a free kick into the wall, Dario Manso had a shot saved by Fernando Henrique and Guerron snapped up the rebound.
Campos scored with a near-post header following a corner five minutes later and Urrutia headed the fourth from another corner on the stroke of halftime.
Thiago Neves headed one back in the 52nd minute as the hosts relaxed.
Fluminense goalkeeper Fernando Henrique was called into action when he saved a Guerron free kick and tipped an Urrutia effort on to the crossbar in the last minute.
(Writing by Brian Homewood in Buenos Aires; Editing by Ed Osmond)