CHICAGO — Kahleah Copper scored 20 of her 22 points in the first half and Chicago used a dominant defensive effort to reach a record rout of the Phoenix Mercury 86-50 on Friday night, moving the Sky one victory away from the franchise’s first WNBA title. Chicago will look to close out the best of five series on Sunday. “I was telling my team. I’m 0-2 in Game 4 closeout at home,” said Candace Parker, who added 13 points. “I don’t want that to continue. We know they are a fantastic team and they’ll come out and be ready. Come back stronger.” The Sky dominated on both ends, holding Brittney Griner to just four first half points on 1 of 8 shooting after she scored 29 in the Mercury’s overtime win on Wednesday. Chicago also took Diana Taurasi out of the game, holding to her five points on 1 of 10 shooting. Griner finished with 16 points as both of their night’s ended early in the fourth quarter as the Sky kept the lead in the twenties. Copper set the tone early for the Sky with seven ...