By Nic Evans
Last Updated: 01/01/70 1:00am
Robbie Keane continued his rich vein of pre-season form with a two goal blast in the first half, but David O'Leary must be slightly worried that his Irish star had to go off with a head injury.
Keane opened the scoring in the first minute and when Mark Viduka made it two shortly afterwards, Leeds were never in any danger.
The home side were briefly lifted by Anders Nielson's spectacular 30-yard free-kick that rocketed into the top corner but in the second half it was Leeds again that dominated.
Ian Harte smashed in a free-kick of his own, whilst Eirik Bakke and Alan Smith got the fifth and sixth goals respectively.
Charlton fell 2-1 to Roda JC in Holland on Tuesday.
A first half that saw a succession of injuries to both sides promised little. However, the second period was a brighter affair
On the hour, a defensive lapse in the opposition half by Luke Young let in Tom Soetaers and the striker ran fully 60 yards before finishing clinically to put the home side 1-0 up.
It was Soetaers again, three minutes later that made it two as he worked space for himself on the edge of the box before firing past Dean Kiely in the visiting net.
Jonaton Johansson added a consolation goal for Charlton in the last minute, but Roda were well worth their win.
Derby entertained Barcelona on Friday night, two days after the Catalan side had been in Poland playing in the Champions League and their sharpness was much in evidence as three goals in the opening quarter-of-an-hour gave the visitors the win.
It took Barca just five minutes to get the opening goal as Xavi floated a pass to Patrick Kluivert who easily beat the on-rushing Andy Oakes.
After kicking off, Derby lost possession to Xavi again and his pass to Marc Overmars allowed the Dutch winger to go off on one of his trademark runs before pulling the ball back to Kluivert who again found the net.
Brazilian star Geovanni Deiberson linked up with Dutch international Philip Cocu and it was the former who beat Oakes for the third of the game, with just 15 minutes on the clock.
The second half showed none of the fireworks of the first after a series of substitutions, although Derby managed to keep the score down to three.
Elsewhere Leicester and Fiorentina played out an entertaining 3-3 draw, with City striker Dean Sturridge grabbing a hat-trick.
Portuguese striker Nuno Gomes, the subject of much transfer speculation gave the visitors the lead in the 34th minute as Ian Walker palmed out Ezequiel Gonzalez's shot straight into the predatory striker's path.
Yet the Foxes were back on level-terms within a minute when Sturridge expertly guided his volley into the net.
The second half started in blistering fashion as Sturridge made it 2-1 to the hosts following an Alex Manninger error, only to see Enrico Chiesa make it 2-2 on the stroke of half time.
Fiorentina seemed set for victory when Chiesa curled in a delightful shot, only for Sturridge to prod home his hat-trick in injury time to leave matters level.
Sunderland crashed to a 4-0 defeat in Holland to Eredivisie side NAC Breda and had Emerson Thome sent off into the bargain.
NAC stormed ahead after just five minutes when Earnest Stewart beat the offside trap to fire past Thomas Sorenson.
Kevin Bobson, the former Ajax starlet was at the heart of much of NAC's attacks and his pass set up Glen Salmon for the second.
In the second half it was Bobson again at the heart of controversy and Brazilian Thome was sent off for a poorly timed two-footed tackle on the playmaker.
With 15 minutes to go the game was over when Regillio Simons smashed in a superb rising effort past Austrian keeper Jurgen Macho.
Cristiano completed a dismal night for Sunderland as he fired in from close range with a minute to go.