The Washington Nationals enter their Tuesday series opener in Philadelphia on the heels of a humbling defeat, and they will be challenged to get back on track as they face Phillies ace Zack Wheeler.

Washington Nationals (13-16, fourth in the NL East) vs. Philadelphia Phillies (15-13, second in the NL East) Philadelphia; Tuesday, 6:45 p.m. EDT PITCHING PROBABLES: Nationals: MacKenzie Gore (2-3, 3.