Europe captain Colin Montgomerie paired Italian brothers Edoardo and Francesco Molinari together for the first official practice session of the 2010 Ryder Cup.
Northern Ireland duo Graeme McDowell and Rory McIlroy also played as a team as did Lee Westwood and Martin Kaymer.
Padraig Harrington teamed up with Luke Donald, Ian Poulter and Ross Fisher formed another pair while Peter Hanson and Miguel Angel Jimenez completed the match-ups.
Meanwhile, McDowell believes Montgomerie was correct to pick three-time Major winner Harrington as one of his wildcards.
The 39-year-old was a controversial choice as he has a poor Ryder Cup record and has endured an inconsistent year.
Montgomerie chose the Dubliner ahead of world number seven Paul Casey and Justin Rose, a decision McDowell is happy with.
He said: "I'm sure there's no better man to handle the pressure than Padraig and I fully expect him to be a force on the team. You fully expect Padraig to be the kind of guy that will work so hard and will make sure he's as well prepared as anyone.
"You can be certain he's hit quite a few balls the last three weeks. I suspect there's a fair amount of turf been removed down in Dublin.
"I'm sure Monty is keeping a close eye on him. It doesn't matter what anyone has done the last ten weeks - it's all about how they play at Celtic Manor and what form they take in there with them.
"I'm also sure that, as far as Monty is concerned, your picks have to play - there's no point picking a player to sit him out. It doesn't reflect well on anyone if he gets a pick and then doesn't play a lot of golf."