OKLAHOMA CITY — Shai Gilgeous-Alexander had 37 points and nine assists, and the Oklahoma City Thunder defeated the Phoenix Suns 120-107 on Wednesday night to take a 2-0 lead in their first-round Western Conference playoff series.Gilgeous-Alexander scored 25 points in the series-opening win on Sunday, going 5 for 18 from the field. He bounced back in Game 2 with 13-for-25 shooting after being presented the NBA Clutch Player of the Year trophy before the game.Chet Holmgren and Jalen Williams each added 19 points for Oklahoma City, though Williams left the game in the third quarter with a left hamstring injury and did not return. Williams, an All-Star in 2024-25, missed 30 games this season with a right hamstring injury after missing the first 19 games of the season following surgery on his right wrist.Five higher-seeded teams had lost home games in the first week of the playoffs before Wednesday, including the top three seeds in the Eastern Conference, Detroit, Boston and New York, and the No. 2 and 3 seeds in the West, San Antonio and Denver. Oklahoma City avoided that fate by shooting 47.3% from the field and forcing 21 turnovers.Dillon Brooks led the Suns with 30 points before fouling out in the fourth quarter. Devin Booker scored 22 points and Jalen Green added 21 for Phoenix, which will host Game 3 on Saturday. The Thunder led 65-57 at halftime. Williams made his first six field goals and …