D'Ambrosio said the senior forward found himself "in the right place at the right time" as Harvey recovered Arvelle Jones' missed shot.
Despite Harvey being just 6-foot-2, D'Ambrosio said the player presents mismatches with his strength and versatility. He finished with 16 points and three blocked shots.
Jones added six rebounds and John Parker scored nine points and had five asssits.
Central. Nick Kelly's 31 points led Radnor over host Ridley, 60-55.
Justin McFadden pulled down 11 rebounds and scored 16 points to help Lower Merion knock off host Garnet Valley, 67-51. Joey Sweeney had 13 points and five rebounds for the Jaguars.
James VanDeventer poured in a game-high 18 points as Conestoga downed visiting Marple Newtown, 66-50.
Inter-Ac. Shawn Alston scored 15 of his 19 points in the first half as host Haverford School raced past Penn Charter, 54-47. Eric Anderson had a team-high 21 points.
Mike Jolaoso dished out six assists and scored 15 points to lead Episcopal Academy over visiting Springside Chestnut Hill, 57-46. Nick Alikakos added 12 points and 10 rebounds.
Sophomore point guard Devon Goodman scored a career-high 22 points and Germantown Academy rolled over visiting Malvern Prep, 68-46. Tim Guers added 14 points and 14 rebounds.
Suburban One. Cory Hamlet's 14 points and John Ryan's 13 points led William Tennent at Truman, 50-48.
Matt Penecale scored nine points as Abington used a balanced attack to east past visiting Bensalem, 71-26.
Senior power forward Mark Conran scored all 12 of his points in the first half and Upper Dublin raced past visiting Upper Merion, 47-30.
Friends Schools. Habib n'Garmin's steal with seven seconds left sealed visiting Westtown's 42-40 overtime win over Academy of the New Church. Maryland-bound Jared Nickens led the way with 16 points.
Del-Val. Chester shot 20 for 24 from the foul line to hold off host Glen Mills, 53-48.
Public. Ahmad Gilbert scored a game-high 28 points and then picked up a scholarship offer from Rhode Island after Constitution cruised past visiting Philadelphia Electrical, 80-69. Lincoln Kpokuyou added seven points and six steals.
Jamar Brisbon scored 22 points - 11 of which came in the fourth quarter - and Boys' Latin pulled away from visiting Sankofa Freedom, 86-80.
James Cottrell scored nine points in both the second and fourth quarters en route to 20 points as Washington Dropped visiting Fels, 75-55.
Basil Thompson grabbed nine rebounds and scored 12 points to lead Imhotep Charter past visiting Math, Civics and Sciences, 67-60.