Tampa Bay Lightning\'s Vincent Lecavalier, right, tries to keep the puck while being shadowed by Ottawa Senators\' Chris Phillips during the first period of an NHL hockey game Sunday. (AP Photo/Mike Carlson)
Johan Holmqvist made 22 saves for the Lightning, who have won three straight and seven of 10. The goalie made a sliding pad save on Joseph Corvo's in-close shot in the second.
Tampa Bay also got a power-play goal from Martin St. Louis with 1:18 left.
Jason Spezza scored for the Senators, who had won four in a row.
The Lightning had lost eight straight regular-season games to Ottawa, dating to a 2-1 win in Ottawa on March 1, 2003. This was the first meeting between the teams since the Senators beat Tampa Bay in five games in an Eastern Conference quarter-finals last spring.
Kuba tied it 1-1 at 10:28 of the second. Richards then gave Tampa Bay a 2-1 lead from the slot with 8:56 left in the period.
Spezza put the Senators ahead 1-0 from the top of the right circle at 3:34 of the first. Dany Heatley, who has two assists and five points in the last two games, assisted on the goal.
Ottawa's Andrej Meszaros hit the post and Heatley had a backhander stopped by Holmqvist midway through the third.
Notes: Senators D Anton Volchenkov (lower body injury) didn't play . . . St. Louis also had an assist, and has five assists and nine points during a four-game point streak . . . Senators RW Daniel Alfredsson had his seven-game point streak end. He had three goals and five assists during the stretch.