Ranked 26th in the world, six-time US Open champion Serena Williams is the only player seeded above her ranking in the 2018 draw.
Alexander Zverev and Nick Kyrgios can be the ATP Tour's stars in the future, but Andre Agassi does not feel they are ready yet.
Marco Cecchinato failed to make it past the second round of the ATP 250 tournament, the Italian upstaged by Jan-Lennard Struff on Monday.
A three-time winner in New Haven, Petra Kvitova was too good for former world number two and 2016 champion Agnieszka Radwanska.
After playing two WTA Tour finals in the last two weeks, Simona Halep's sore Achilles has forced her to withdraw from the Connecticut Open.
As he continues to work his way back from knee surgery, Jo-Wilfried Tsonga will not play at the US Open at Flushing Meadows.
Take a look at how Novak Djokovic became the first man to win all ATP Masters 1000 events, from Miami 2007 to Cincinnati 2018.
After losing out to Novak Djokovic in Sunday's Cinicinnati Masters final, Roger Federer cannot wait to get back in action at the US Open.
Andreas Seppi saw off Joao Sousa 7-5 6-4 to earn a meeting with 14th seed Nicolas Jarry at the ATP 250 event.
Unseeded before being bumped up to ninth following Ashleigh Barty's withdrawal, ninth seed Daria Gavrilova beat Irina-Camelia Begu.