Giddey had 18 points, nine rebounds and seven assists and Gilgeous-Alexander top-scored for the Thunder with 30 points in the 129-119 NBA loss on Monday (Tuesday AEDT).
OKC had won their three previous games against the Knicks.
Daniels had nine points, five rebounds and two assists in more than 20 minutes of game-time against a Warriors lineup playing without superstar quartet Stephen Curry, Klay Thompson, Draymond Green and Andrew Wiggins.
Trae Young had 25 points and 10 assists for the Hawks
Simmons will take good form into the clash, having scored 22 points in Brooklyn's win over Memphis on Monday.
He has looked a revitalised player since being shifted to back-up centre under new Nets coach Jacque Vaughn.
In further good news for the Australian, he will not have to contend with towering superstar 76ers centre Joel Embiid, who will miss the game with a foot injury.
Even so, Simmons is under no illusions about the hot reception awaiting him from the hostile Philly crowd.
"'I know what's coming," he told reporters with a wry smile after the win over the Grizzlies.
- with AP