Harlequins maul

Jack Walker feeds the lineout 5m out

Marcus Smith opts for touch

Harlequins win a penalty on the 22m after the restart

Scott Cummings powers over after 15 phases of attack to put Glasgow in the lead

Steyn makes metres down the edge

Glasgow stringing together phases as they approach the 22m

Danny Care clears from the base of the ruck after kickoff

Welcome to the live commentary for the Round of 16 Champions Cup clash between Harlequins and Glasgow Warriors.