Wednesday's Lyon (France) round of 32 pits Martin Landaluce against Stan Wawrinka on clay. Martin Landaluce is rolling — 4 straight wins, 5 of 10 in recent play. Stan Wawrinka is searching for form, having lost 3 in a row (2 of the last 10).
Martin Landaluce simply rates much higher on clay, and our number follows from it. Little separates them; Landaluce gets the nod on the finest of margins.