Lane Thomas drove in the go-ahead run with a 10th-inning sacrifice fly and the visiting Washington Nationals extended their winning streak to four games by defeating the host Detroit Tigers 5-4 on Tuesday.Thomas had two RBIs. Kyle Finnegan (2-3) struck out three in 1 1/3 perfect innings to pick up the win in the opener of a three-game series.Riley Greene had a three-run triple for the Tigers, who fell for the fourth time in five games.Detroit starter Kenta Maeda gave up one run and one hit in four innings but walked four while striking out five. Washington starter Mitchell Parker allowed four runs, all unearned, in 4 2/3 innings. He yielded four hits and three walks while fanning one.Washington took a 5-4 lead in the 10th as automatic runner Jacob Young moved to third on a wild pitch by Andrew Chafin (3-2). CJ Abrams, who swung through the errant pitch, reached first. Thomas then drove in Young with a fly ball to right.The Tigers threatened in the first two innings and didn’t score.Maeda’s control issues allowed the Nationals to take the lead in the third. Nick Senzel led off with a single. Young drew a one-out walk, and Thomas and Jesse Winker drew two-out walks to force in a run. Maeda then fanned Eddie Rosario to minimize the damage.