Saudi Arabia's Public Investment Fund will become the first naming partner of the official WTA world rankings, after signing a "multi-year" contract.
Iga Swiatek is through to the Madrid Open semifinals after beating Maia Haddad 4-6 6-0 6-2 on Tuesday.
Iga Swiatek arrives in Madrid celebrating her 100th week as the world No.1, a milestone only achieved by eight other women in tour history.
Elena Rybakina won her third WTA Tour title of the year when she defeated Marta Kostyuk in the Porsche Tennis Grand Prix final on Sunday.
Danielle Collins secured back-to-back WTA Tour titles when she defeated Daria Kasatkina 6-2 6-1 in the Charleston Open final on Sunday.
The WTA has announced that Riyadh, Saudi Arabia will be hosting the next three editions of the WTA Finals.