Coello/Tapia arrive as the benchmark pair: elite pace, transition speed, and superior rally management make them clear favorites against Guichard/Blanque. In Riyadh’s typically quicker, drier conditions, their ability to finish points early (Tapia’s acceleration, Coello’s lefty power) should magnify the gap. Expect the underdogs to have chances only if they slow the match with lobs and force long, physical exchanges; Coello/Tapia still project a straight-sets win.