LaDouceur retired last spring after serving as a head high school tennis coach in Grand Forks for 30 years, first at Grand Forks Central, then at Grand Forks Red River.
His teams won 21 state team championships — one with the Central boys program, 15 with the Red River boys team and five with the Red River girls program. LaDouceur had 19 teams that had undefeated seasons.
His players won a total of 15 singles and 20 doubles state championships.
LaDouceur has been a part of two of the longest winning streaks in the state’s history.
LaDouceur has been the Red River boys tennis coach since the fall of 2001. He succeeded Kerry Jaeger, whose team closed the 2000 season with 11 straight dual wins. The Roughriders didn’t lose again until the 2015 season — a run of 211 consecutive dual wins.
LaDouceur replaced Tim Wynne as the Riders girls tennis coach in 2012 in the midst of another long winning streak. The team would extend its run to 203 consecutive dual wins before suffering a loss in the 2016 season.
He was named 2012 national tennis coach of the year and a finalist two other times. LaDouceur was inducted into the North Dakota High School Coaches Association Hall of Fame in 2016.