The San Antonio Spurs outclassed the Minnesota Timberwolves 139-109 in a Game 6 win Friday, securing a spot in the Western Conference finals.The win propelled the Spurs to a matchup against the defending champion Oklahoma City Thunder. It also denied the Timberwolves a third consecutive appearance in the West finals.San Antonio is in the West finals for the first time since 2017.The Timberwolves never led and watched the Spurs’ lead reach 37 points. The Spurs won Game 5 on Tuesday by 29 points and Game 2 by 38.Second-year Spurs guard Stephon Castle scored 32 points, one point off his career playoff high (set in Game 3 of the first-round series against the Portland Trail Blazers), and was 5-of-7 on 3-pointers. Castle also had 11 rebounds.De’Aaron Fox added 21 points on 8-of-10 shooting and recorded nine assists, and Victor Wembanyama scored 19 points for the Spurs. Anthony Edwards (9-of-26) led the Timberwolves with 24 points. Terrence Shannon Jr. had 21 points off the bench.Here are key takeaways from Game 6:Spurs’ basketball identity on full displayThe Spurs’ series ended the way it needed to. Their guards tormented the Wolves, and Wembanyama was a defensive force Minnesota could not overcome.This was the Spurs’ identity at its absolute best, overwhelming the opponent with speed and touch at the rim.Castle became the first Spurs player with at least 30 points, eight rebounds, five assists and five 3-pointers in a playoff game. It was borderline perfection from the “Slash Brothers,” Castle and Dylan Harper, with their mentor, Fox. This was a crucial coda to the series for Fox, who was unstoppable offensively to finish a mostly rough series for him.His scoring will be sorely needed against the Thunder, who have the trickiest defense in the league and will push the Spurs’ young guys to their limits. His composure and savvy were instrumental in carving up the Wolves defense in Game 6, and the Spurs will need his best to get past the Thunder.