Seems to be a war of attrition.

What happened?

So why was Zebo taken off?

Why

Munster going forward but Ulster turnover at the breakdown and set off on attack.

Jackson breaks through the tackle excellently, he offloads to Cave but the centre can't hold onto the ball. Munster will have a scrum inside their 22.

Ulster on the front foot outside the Munster 22.

Penalty Ulster as Peter O'Mahony playing the ball on the ground. Jackson sticks the ball into touch.

No clear cut chances for Ulster yet even though they have seen a lot of ball.

Van Der Merwe back on his feet, game resumes with an Ulster scrum.