[6] Michael Venus (NZL) and Nikola Mektić (CRO) v [1] Marcelo Arevalo (ESA) and Mate Pavić (CRO)

Michael Venus and Nikola Mektić got through their earlier matches in Madrid safely, but facing top seeds Marcelo Arevalo and Mate Pavić in the quarter-finals was always going to be a lot more difficult.  Arevalo served first, and was cruising at 40-0 before Mektić saved the first game point with a cross-court backhand winner.  Arevalo…