The Norwegian is down to No. 10 in the latest rankings and an early departure this week could see him drop outside of the Top 15 depending on the results of his peers in Spain and at Munich's BMW Open. A meeting with Hamad Medjedovic stands as Ruud’s next challenge.
As for Tsitsipas, he fell eight spots to No. 16 and began the week at No. 19 in the live rankings. The 26-year-old blew past Reilly Opelka, 6-2, 6-2, to confidently launch his campaign. Another American opponent, Sebastian Korda, awaits with a quarterfinal spot at stake.
Ruud is in the same quarter of the draw as sixth-seeded Holger Rune, while Tsitsipas is projected to meet seventh seed Arthur Fils in the last eight.