India, Aug. 19 -- Alexander Zverev and Tommy Paul are set for a closely fought Round of 16 encounter at the Cincinnati Open, with the world No. 2 and 22nd-ranked American bringing contrasting paths into the matchup.

Zverev has battled his way through the tournament, recovering from a slow start against Cameron Norrie before beating Terence Atmane 7-6(4), 7-6(6) in the third round. His first serve has been a major weapon, with the German winning around 85% of points behind it. Paul, meanwhile, has been pushed through two demanding three-setters, edging Hubert Hurkacz before rallying from a set and a break down to beat Adolfo Vallejo 3-6, 6-3, 6-4. The American's recent workload could make stamina a key factor against Zverev.

Alexander Zv...