The Nationals haven't been flashy, but they've consistently won series from opponents, leaving them with the NL's best record.
Doug Fister dominates again to win his fourth consecutive start as the Nats beat the Reds 4-2.
Cueto tossed seven scoreless innings, striking out nine to lower his ERA to a 2.08. The Reds right-hander was aided by some questionable base running on the Nationals' part, most notably by Bryce Harper.
Denard Span went 4-for-5 in the team's 4-1 win over the Reds on Friday night, again setting the table for a lineup that has proven dangerous when healthy this season.
Tanner Roark became Washington's first 10-game winner with a 4-1 victory over the Reds.