The Expos are 2-5 so far on the stretch, leaving them just 1 1/2 games ahead of the fourth-place Florida Marlins.
Braves outfielder Chipper Jones homered twice as the Expos squandered a 3-0 lead.
Henry Mateo went 4-for-5 with four singles for Montreal, setting a career high for hits in a game.
“You do what you have to do,” Mateo said. “When you get four hits, you figure your team will win the game.”
The Expos, though, are still in good position to catch second-place Philadelphia. Montreal trails the Phillies by just 1 1/2 games in the tightly packed NL East.
The Phillies have also dropped three straight, getting swept over the weekend by the surging Marlins.
“We’ve been spoiled the last six weeks with our pitching,” Phillies manager Larry Bowa said. “The last two games the starters went five innings and put us in a hole. As good as they’ve been, the starters deserve a bump in the road.”
STANDINGS: Phillies - 2nd place, 7 1/2 GB, NL East. Expos - 3rd place, 9 GB, NL East.
EXPOS PROBABLE STARTER: Livan Hernandez (7-6, 4.05 ERA). Hernandez ended his three-game winless streak in an 11-4 victory over the Mets on Wednesday. He allowed four runs—two earned—and six hits in eight innings to earn his first victory since June 11. In 12 starts against the Phillies, Hernandez is 5-3 with a 3.00 ERA.
PHILLIES PROBABLE STARTER: Brandon Duckworth (3-2, 4.47 ERA). Duckworth is 0-1 in his last five starts, including a 1-0 loss to the Chicago Cubs on Wednesday. The righty gave up three hits in six scoreless innings. In eight starts against the Expos, Duckworth is 1-3 with a 5.59 ERA.
OFFENSIVE LEADERS: Phillies - Mike Lieberthal, .326 avg.; Thome, 22 HRs, 62 RBIs and 57 runs; Bobby Abreu, Jimmy Rollins and Polanco, 9 SBs. Expos - Jose Vidro, .327 avg.; Orlando Cabrera, 12 HRs, 49 RBIs and 55 runs; Endy Chavez, 15 SBs.
SEASON SERIES: Phillies, 4-2.
STREAKS AND NOTES: Phillies - OF Abreu is 8-for-29 (.276) against Hernandez with a homer, triple and a double. … SS Rollins is 2-for-13 in his last three games. … LHP Rheal Cormier pitched 16 2-3 consecutive scoreless innings. Expos - Montreal has won seven of its last 10 home games. … OF Brad Wilkerson has struck out nine times in his last four games, including four times on Sunday. … OF Chavez is 2-for-16 in his last five games.
ROAD/HOME RECORDS: Phillies - 21-18 on the road; Expos - 26-14 at home.
INJURIES: Phillies - INF Tyler Houston (finger), 15-day DL; RHP David Coggin (shoulder), 15-day DL. Expos - IF Fernando Tatis (chest), 15-day DL; OF Vladimir Guerrero (back), 15-day DL; RHP Tony Armas Jr. (shoulder), 15-day DL; RHP Luis Ayala (shoulder), 15-day DL; RHP Zach Day (shoulder), 15-day DL; RHP Orlando Hernandez (shoulder), 15-day DL; RHP Dan Smith (shoulder), 15-day DL.