ARLINGTON — Mansfield Summit opened an early nine-point lead and never relented as the Jaguars downed Arlington Seguin 50-33 in a District 15-4A girls game Friday night at Summit High School.The victory by Summit, ranked 12th in the state by the Texas Association of Basketball Coaches, created a tie at the top of the district standings with 11th-ranked Seguin as each team won on its home floor.Both teams entered the game having clinched playoff spots. Summit (21-7, 10-1 district) lost 54-48 to Seguin (20-8, 10-1) in their first meeting, so Jaguars coach Tammy Lusinger decided to change her strategy by using a zone defense.“We’re more of a man-to-man team, but we don’t match up well against them because they start four guards and we would prefer to have two posts on the floor,” Lusinger said. “I think we made them play a lot slower than they like to play.”A quick start by Keanna Kelly helped the Jaguars build a 12-3 lead with 2:29 left in the first quarter. Kelly had six points during the spree and scored 12 of her game-high 17 points in the first half.A 3-pointer by Laurynn McGowen at the end of the first quarter pulled the Cougars back to within six at 16-10, but from that point Summit took over.“The first time we played them we played fast in the first half and had a nice lead, but we ran out of gas in the second half and they didn’t,” Lusinger said. “So going in we thought we’d try something different and the kids executed perfectly.”Alarie Mayze led Seguin with 13 points and eight rebounds, but the Cougars shot poorly all night hitting only 35 percent from the floor and going 4-of-14 from the free throw line.The Summit defense rarely allowed Seguin a second shot and out rebounded the Cougars 35-23.