Alviro Petersen available for Somerset's T20 campaign

Somerset's overseas signing Alviro Petersen has agreed to extend his stay to feature in their Twenty20 campaign.

The South Africa opening batsman, who scored a century in the opening Test match against New Zealand last week, initially signed for the first half of the Championship season.

The 32-year-old will now stay until the end of July.

"I am very pleased that I will now be able to stay on at Somerset and play in the Twenty20 competition," he said.

"Over the years they have done well in the competition and I would like to think that my contributions will help them to lift the trophy."

Head coach Andy Hurry said: "This is great news for Somerset and having a top-class performer like Alviro in our T20 squad will certainly boost our batting and bring a wealth of experience to the side."

Port Elizabeth-born Petersen has featured in 20 Tests for his country, as well as 17 one-day internationals and two T20 internationals.

He has County Championship experience with Essex and Glamorgan.