MIAMI -- Shota Imanaga delivered a masterful performance under the Friday night lights, guiding the Chicago Cubs to a 6-1 victory over the Miami Marlins. The Japanese left-hander scattered three hits and surrendered only one run across six innings, striking out four without issuing a walk. Imanaga, now 9-10 on the season, improved to 4-2 in nine starts since the All-Star break, a stretch that has solidified his role as a reliable anchor in the Cubs' rotation. Aaron Civale took over in the seventh and pitched three scoreless innings, earning his second save of the year.

Pete Crow-Armstrong continues to build a compelling case for National League MVP. The center fielder doubled, drew a four-pitch walk, scored twice, and stole his 33rd base of the season. But his defensive highlight came in the sixth inning when he sprinted to the center-field wall and leaped to rob Miami's Heriberto Hernández of what would have been a run-scoring extra-base hit. The play drew a roar from the Cubs' dugout and preserved a four-run lead.

Alex Bregman extended his hitting streak to eight games, dating back to August 28, with two singles and a walk. Nico Hoerner contributed three hits and an RBI, while Pedro RamĂ­rez drove in two runs. Michael Busch punctuated the night with a solo home run in the ninth inning, a 427-foot blast to right-center field off Marlins reliever Bradley Blalock, giving him 18 homers on the year.

Marlins starter Janson Junk (6-9) was sharp through five innings, limiting Chicago to one run on three hits while striking out five. That lone run came in the second inning when Ian Happ scored on a fielder's choice by RamĂ­rez. The game remained tight until the Cubs broke through in the sixth against the Marlins' bullpen. Crow-Armstrong led off with a walk from Jack Ralston, who then issued one-out walks to Michael Busch and Bregman. Josh Ekness entered and walked in a run, then allowed an RBI single to Hoerner. RamĂ­rez followed with a sacrifice fly, pushing the lead to 4-0.

Miami finally got on the board in the seventh. Griffin Conine singled, moved to third on a double by Deyvison De Los Santos, and scored on a groundout by Esteury Ruiz. Conine finished with two hits, and De Los Santos doubled, but the Marlins could not generate further offense against Civale, who retired the final eight batters he faced.

Looking ahead, the Cubs will send right-hander Javier Assad (6-1, 3.46 ERA) to the mound for the second game of the series on Saturday. The Marlins counter with righty Ryan Gusto (1-3, 3.86 ERA). First pitch is scheduled for 6:10 p.m. ET at loanDepot park.