Cambridge in possession again, another box kick but this time Oxford's Ben Ransom does well and gathers.

It allows Oxford to set up in a good position in the Light Blue half.

Mike Phillips makes it three penalties from three attempts to extend the Light Blue lead.

Elliot Baines goes over in the corner for Cambridge after another period of pressure which saw the Dark Blues concede a penalty.

But he is just in touch as he grounds the ball - very close.

Cambridge come back for the penalty and opt for another three points.

Image source, Getty Images

I've lost count of the number of line-outs that Oxford have lost on their own throw.

This one sets Cambridge up for a great attack on the Dark Blue 22.

A knock on from the resulting Light Blue attack gives Cambridge a scrum on the Oxford 22m line.

Cambridge's turn to have a go now - they're trying to pin the Dark Blues inside their own half, although Oxford's scrum-half George Tresidder kicks to touch to give them a breather.

Cambridge survive - they win a free-kick on their own scrum and blast the ball down to the half-way line.

Can they set up an attack of their own now?

What a chance blown by Oxford!

The Dark Blues piled towards the line but great defending by Cambridge forced Oxford to cough the ball up and the Light Blues have a scrum on their own 5m line.

Brian Moore
Former England hooker on BBC Two

It's Oxford's first effective campaign into Cambridge territory and that will settle them.

So close for Oxford. Dom Waldouck is held up on the line as the Heineken Cup winner tries to go over.

The Light Blues are have the upper hand now - they need to make this pressure count.

Image source, BBC Sport

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Oxford are getting back into this game now.

They win another penalty on the halfway line and kick for touch on the left.

Humberstone gets Oxford on the board.

Oxford probing the Cambridge defence deep in Light Blue territory.

The ball is recycled to the backs, but it is stopped by a second high tackle.

Cambridge skipper Nick Koster is told by Nigel Owens in no uncertain terms that there will not be a third high tackle by a Light Blue player.

Oxford opt to kick for three points this time...

Oxford win a penalty for a high tackle and have a chance for their first points - but they decide to kick to the corner.

Can their revered rolling maul test the Light Blue defence?

Oxford have had their first decent spell of possession for a long time, but Cambridge's defence has held firm so far as the likes of Dom Waldouck have yet to make a mark in this game.

Image source, BBC Sport

Two from two for the Light Blues' fly-half - this one from a tough angle on the left.

Brian Moore
Former England hooker on BBC Two

On the balance of play, the lead is probably just about deserved. Oxford did look reasonably comfortable in that defensive set, but credit to Cambridge for their patience through multiple phases.

Oxford are really struggling to deal with the box kicks from Cambridge's scrum half George Tresidder.

They have lost out on the ball a number of times and have now conceded a scrum inside their own 22 - the scrum turns around and Oxford concede a second penalty.

Cambridge starting to assert their control here as they force Oxford back deep into their own half.

The Light Blues have already seen one player go off with blood from his face while another is lying prone on the ground.

No quarter has been given so far.

Image source, BBC Sport

Mike Phillips makes no mistake as he splits the posts to give Cambridge an early lead.