John Collins' career was shaped by his move from Celtic to Monaco in 1996, where he played alongside a couple of promising youngsters named Thierry Henry and David Trezeguet.Here, Collins tells us how the two French internationalists carried the hamper into the dressing ground at every away game in the season prior to winning the World Cup.During his time in France, Collins underwent a technical and tactical revolution, but his marginal gains approach to self-improvement started in his teens.