Alex de Minaur was a late withdrawal from the Adelaide International, while Benoit Paire progressed in Auckland.
Thanks to Novak Djokovic and Filip Krajinovic, Serbia reached the Davis Cup quarter-finals alongside Great Britain and Germany.
Andrey Rublev's fine 2019 came to a disappointing end as Jo-Wilfried Tsonga ended his long wait for an ATP Masters 1000 match.
Having dropped just three games in his first-round win at the Swiss Indoors Basel, Roger Federer expressed delight at his fast start.
Borna Coric is the last man standing in the way of US Open runner-up Daniil Medvedev earning a rare Russian success in St Petersburg.
Andrey Rublev has claimed some big scalps in 2019, but came unstuck against US Open runner up Daniil Medvedev in St Petersburg on Friday.
Richard Gasquet lost for just the second time in nine career meetings with Benoit Paire in an-all French clash in Metz.
Hubert Hurkacz made Polish history as the third seed stunned Benoit Paire 6-3 3-6 6-3 at the ATP 250 tournament in North Carolina.
Benoit Paire and Hubert Hurkacz will meet in the final of the Winston-Salem Open.
The Winston-Salem Open quarter-finals were pushed back to Friday due to bad weather in North Carolina.