PARIS, March 29 (Reuters) - Paris St Germain offered a glimpse of what Barcelona can expect in their Champions League clash next week when Kevin Gameiro finished off a lightning quick counter attack to earn the Ligue 1 leaders a 1-0 home win against Montpellier on Friday. Substitute Gameiro tapped in from a Zlatan Ibrahimovic cross 10 minutes from time after David Beckham started a counter attack nine minutes after coming on as a substitute. PSG have 61 points from 30 games and lead second-placed Olympique Lyon, who take on Sochaux on Sunday, by eight points. ... More...