Yuvraj's left-arm deliveries helped restrict the previously big-hitting Ireland to a modest total [AFP]

Yuvraj Singh produced a stunning all-round show to become the first player to pair a five-wicket haul with a half century in the World Cup as India pulled off a nervy victory over Ireland.

Yuvraj's slow left-arm deliveries helped India to bowl out Ireland for a modest 207 and he followed that up with 50 not out off 75 balls to steer his team to a five-wicket victory in Group B, ensuring they stay unbeaten.

The 29-year-old and his captain Mahendra Singh Dhoni played uncharacteristically sedate knocks and stitched together a 67-run partnership to set India well on their course to victory in Bangalore.

The duo came together with India precariously perched at 100-4 after Sachin Tendulkar (38) and Virat Kohli (34) fell in quick succession.

Following Dhoni's dismissal for 34, Yusuf Pathan blazed a quickfire 30 off 24 balls with three towering sixes to finish off the match.

"I am definitely very happy with my bowling. First five-wicket haul and I am happy that I could finish off the game," man-of-the-match Yuvraj said with a wide grin.

"Ireland played well and put us under pressure. They fielded exceptionally."

Yuvraj's captain Mahendra Singh Dhoni agreed: "Frankly speaking, the scoreboard said 208-odd runs but it was close to 240 because the Ireland side fielded really well and their bowlers were very well backed up by the fielders."

Ireland used as many as eight bowlers to try and dislodge the pair but they dealt with the varied bowling attack and managed to score at a modest pace.

The most impressive Irish bowlers were their young spinners.

The 20-year-old Paul Stirling finished with none for 45 and the 18-year-old off-spinner George Dockrell finished with two for 49 – their figures spoilt by Pathan's blitz at the very end.