Sydney, September 14: The men's Olympic football tournament danced to a Latin beat here on Thursday as Groups B and D kicked off with Brazil, Chile and Spain all recording impressive victories.Brazil defeated Slovakia 3-1 in Group D while an Ivan Zamorano-inspired Chile whipped Morocco 4-1 and Spain hammered South Korea 3-0 in Group B. In the other Group D Match Japan scored a late winner to see off South Africa 2-1.Brazil's bid for an Olympic football gold, the only major title to have eluded the aristocrats of world football, got off to a winning start.Goals from centre forward Edu, impressive left back Fabio Aurelio and an injury-time effort from captain Alex secured the win after the well-organised Slovakians had taken a shock early lead.Brazil dominated the opening exchanges without ever-looking dangerous and they were made to pay the price for some complacent defending in the 27th minute.A Slovakian counter-attack appeared to be petering out as Jan Slahor found himself cornered on the left hand edge of the box by Baiano and Fabio Bilica.But somehow the Slovan Bratislava forward managed to squeeze between the two Brazilian defenders and clip the ball back for Andrej Porazik to slot home easily from just in front of the penalty spot.Forced to up the tempo, Brazil equalised four minutes later after a sweeping four-touch move that came straight from the flair football textbook.Wriggling free of his marker in the centre circle, Ronaldinho picked out Alex 20 yards upfield. The Brazilian skipper met the pass with an equally precise volley to Edu on the edge of the box.The big striker made no mistake, chesting the ball down into the space between his two markers and slotting a low right foot shot pass into the far corner of the net.That was the last real chance the Slovakians had. After the break Brazil moved up a gear and it was only a matter of time before they scored again.In the 67th minute, Fabio Aurelio played a sweet one-two with Edu to break into the box. The left back hit the touchline and fired in a low cross that took a cruel deflection off right-back Marian Cisovsky's boot into the Slovak net.Late substitute Mozart made the Brazilians final goal. After breaking free on the left he fired a low cross across the Slovakian goalmouth for Alex to sidefoot home at the back post.In the other match in the pool Japan came from behind to defeat South Africa 2-1.In Pool B Inter Milan striker Zamorano won the individual plaudits as he killed the game with three clinical strikes after 36, 45 and 55 minutes including a penalty before winning another spot-kick and unselfishly allowing Reinaldo Navia to get his name on the scoresheet after 72 minutes.Moroccan substitute El Houssaine Ouchla then grabbed a consolation seven minutes later.The North Africans had been handicapped for almost all the match when they were reduced to 10 men in the openingSpain were equally emphatic in the other Group B match with a first-half goal blitz which saw their opponent's defence slashed to ribbons.Captain Toni Velamazan of Espanyol opened the rout on 10 minutes and in the 26th minute Jose Mari cut inside from the left-flank, wrong-footed defender Park Dong-Hyuk and thumped in a thunderous shot from eight yards out to make it 2-0. Xavi completed the first half scoring on 37 minutes after good work by Real Mallorca's Raul Tamudo on the left wing.