HALF TIME! The first half concludes with Patchell scoring penalty kick to further the home side's lead. The score is 15-6 to Cardiff as the side's head in for the end of the half. Strong attacks from both teams here but it is the home team coming off the better of the two. Well worked tries by Patchell and Williams early on in the game have kept Cardiff ahead throughout. Live updates of the second half to follow shortly.

The gap has been closed even further as Hart converts his second kick at goal successfully.

Patchell fails to further the home side's lead as he misses a penalty kick.

Two early changes for Cardiff as Turnbull and Allen come on in place of Hoeata and Thomas.

Grenoble earn their first points of the game in the 26th minute. James Hart successfully kicks at goal and earns his side 3 points.

Cardiff push on to earn their second try of the match within two minutes of scoring the last. Try scored by Williams.

Try for Cardiff! The home side open the scoring with a try scored by the full back Patchell! Ten minutes in and the lead is 7-0.

And the game has kicked off at Cardiff Arms Park!

Good afternoon and welcome to Ultimate Rugby's live coverage of today's opening round match of the Challenge Cup! Cardiff Blues take on Grenoble at home in Cardiff Arms Park in this new competition. Both teams will be looking for a strong start to this competition and this is set to be a thrilling game. Stay tuned for live updates as we await kick off.

Grenoble haven't faced Welsh opposition in this tournament since they met Bridgend in the 2000/2001 season.