PARIS, April 11 (Reuters) - A Gregory Coupet blunder earned Olympique Marseille a 2-1 win at Olympique Lyon and a place in the French Cup semi-finals on Tuesday.
Coupet, looking to be France's first choice goalkeeper at the World Cup, was at fault in the 65th minute of a tense game when he misjudged a cross and allowed Senegal striker Mamadou Niang to score Marseille's winner.
Lyon, who were beaten in the Champions League quarter-finals by AC Milan last week but were bidding for a double as they close in on a record fifth successive national title, have not won the Cup since 1973.
The visitors opened the scoring after 16 minutes when forward Toifilou Maoulida raced past the Lyon defence to beat Coupet from close range.
However, Fred levelled six minutes later. The Brazilian striker poked home from a Juninho corner.
On 65 minutes, Coupet misjudged Franck Ribery's cross from the right and the ball fell to Niang, who went round defender Anthony Reveillere to double Marseille's tally.
In Tuesday's first quarter-final, a second half goal by Portuguese striker Pedro Pauleta gave Paris St Germain a 2-1 win over Lille and a spot in the last four.
Pauleta, Ligue 1's top scorer with 20 goals, netted on 57 minutes with a fine curling shot from just outside the box.
PSG, who are eighth in the league, hope to regain the Cup they won in 2004 to qualify for the UEFA Cup.
Lille started brightly and opened the scoring in the 30th minute when Greek defender Efstathios Tavlaridis headed home from a corner.
PSG equalised 10 minutes later through Ivory Coast striker Bonaventure Kalou and Pauleta settled the issue.
On Wednesday, Stade Rennes, who have won their last eight league games, take on Ligue 2 side Montpellier and part-timers Calais entertain Nantes in a re-run of the 2000 final which Nantes won 2-1.
The draw for the semi-finals will be made on Thursday.