I didn't find anything for this season, but Fred VanVleet put up 7.5 points per game against the Celtics in 2024-25.

Interpreted as:

vanvleet ppg by opponent this regular season

	OPP	PPG	SEASON	TM	GP	MPG	RPG	APG	SPG	BPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	TPG	MIN	PTS	REB	AST	STL	BLK	TOV	PF	+/-
1	Celtics	7.5	2024-25	HOU	2	33.6	3.0	5.0	0.5	0.0	2.5	8.0	31.3	1.5	5.0	30.0	1.0	1.0	100.0	44.4	0.0	3.0	0.5	67	15	6	10	1	0	1	6	-11
2	Knicks	19.0	2024-25	HOU	1	35.8	2.0	5.0	2.0	1.0	8.0	14.0	57.1	1.0	5.0	20.0	2.0	2.0	100.0	63.8	1.0	1.0	1.0	36	19	2	5	2	1	1	3	+12
3	Warriors	8.8	2024-25	HOU	4	37.3	2.5	5.0	1.3	1.0	2.8	12.3	22.4	1.8	8.0	21.9	1.5	2.0	75.0	33.3	0.5	2.0	1.8	149	35	10	20	5	4	7	15	-13
4	Pistons	13.5	2024-25	HOU	2	37.8	6.0	4.5	4.5	0.5	5.0	14.0	35.7	3.0	10.0	30.0	0.5	2.0	25.0	45.4	2.0	4.0	1.0	76	27	12	9	9	1	2	5	-3
5	Lakers	11.0	2024-25	HOU	2	41.0	3.0	5.5	0.5	0.5	3.5	13.0	26.9	2.0	7.5	26.7	2.0	3.0	66.7	38.4	0.0	3.0	0.5	82	22	6	11	1	1	1	4	-8
6	Kings	8.0	2024-25	HOU	2	35.7	3.5	3.0	1.5	0.0	3.5	12.5	28.0	1.0	8.5	11.8	0.0	0.0		32.0	0.5	3.0	1.0	71	16	7	6	3	0	2	2	-31
7	76ers	8.0	2024-25	HOU	2	40.0	5.0	5.0	2.0	2.0	2.5	10.0	25.0	2.0	7.0	28.6	1.0	1.0	100.0	38.3	0.5	4.5	2.5	80	16	10	10	4	4	5	4	+9
8	Hawks	13.0	2024-25	HOU	2	37.3	4.0	4.5	0.5	0.0	3.5	11.5	30.4	2.0	7.5	26.7	4.0	4.0	100.0	49.0	0.5	3.5	1.5	75	26	8	9	1	0	3	7	+20
9	Wizards	19.0	2024-25	HOU	1	38.1	1.0	12.0	4.0	1.0	7.0	15.0	46.7	2.0	9.0	22.2	3.0	3.0	100.0	58.2	1.0	0.0	2.0	38	19	1	12	4	1	2	3	+17
10	Bulls	25.5	2024-25	HOU	2	31.3	5.5	7.0	1.0	0.5	9.0	18.0	50.0	4.0	10.0	40.0	3.5	5.0	70.0	63.1	0.5	5.0	1.0	63	51	11	14	2	1	2	3	+31
11	Spurs	16.7	2024-25	HOU	3	35.0	4.0	8.7	2.3	0.0	6.3	12.3	51.4	2.7	6.7	40.0	1.3	1.3	100.0	64.5	0.3	3.7	1.7	105	50	12	26	7	0	5	8	+24
12	Nuggets	12.7	2024-25	HOU	3	34.7	1.3	5.3	1.3	0.0	4.3	12.7	34.2	2.7	8.3	32.0	1.3	1.7	80.0	47.3	0.0	1.3	1.3	104	38	4	16	4	0	4	7	-4
13	Pacers	18.0	2024-25	HOU	1	34.7	2.0	6.0	4.0	0.0	6.0	14.0	42.9	4.0	8.0	50.0	2.0	3.0	66.7	58.7	0.0	2.0	1.0	35	18	2	6	4	0	1	1	+30
14	Nets	3.0	2024-25	HOU	1	16.6	0.0	2.0	0.0	0.0	1.0	4.0	25.0	1.0	4.0	25.0	0.0	0.0		37.5	0.0	0.0	0.0	17	3	0	2	0	0	0	1	-1
15	Thunder	17.5	2024-25	HOU	4	36.2	3.5	4.5	0.8	0.0	5.5	13.0	42.3	2.8	7.8	35.5	3.8	4.8	78.9	58.0	0.8	2.8	0.8	145	70	14	18	3	0	3	9	-17
16	Bucks	26.0	2024-25	HOU	1	34.7	6.0	5.0	1.0	1.0	9.0	23.0	39.1	3.0	11.0	27.3	5.0	5.0	100.0	51.6	0.0	6.0	0.0	35	26	6	5	1	1	0	1	+3
17	Suns	11.5	2024-25	HOU	2	28.0	2.0	5.5	3.0	0.0	4.5	9.0	50.0	2.5	6.0	41.7	0.0	0.0		63.9	0.0	2.0	0.5	56	23	4	11	6	0	1	2	+39
18	Clippers	16.5	2024-25	HOU	2	33.7	6.0	7.5	2.0	1.0	6.5	16.5	39.4	3.0	7.5	40.0	0.5	1.0	50.0	48.7	0.0	6.0	2.0	67	33	12	15	4	2	4	4	+29
19	Cavaliers	23.0	2024-25	HOU	2	39.0	3.0	5.5	0.0	0.0	7.0	14.0	50.0	6.5	10.5	61.9	2.5	2.5	100.0	76.2	0.5	2.5	4.0	78	46	6	11	0	0	8	4	+1
20	Trail Blazers	6.3	2024-25	HOU	3	30.6	3.7	5.3	1.3	0.0	2.3	8.3	28.0	1.0	4.3	23.1	0.7	0.7	100.0	36.7	0.0	3.7	2.0	92	19	11	16	4	0	6	11	+28
21	Jazz	4.0	2024-25	HOU	1	34.1	1.0	6.0	1.0	1.0	1.0	10.0	10.0	1.0	7.0	14.3	1.0	1.0	100.0	19.2	1.0	0.0	2.0	34	4	1	6	1	1	2	0	+11
22	Mavericks	5.7	2024-25	HOU	3	35.4	5.7	4.7	2.3	0.0	2.0	9.7	20.7	0.7	5.0	13.3	1.0	1.0	100.0	28.0	0.7	5.0	0.7	106	17	17	14	7	0	2	6	+23
23	Pelicans	19.0	2024-25	HOU	2	30.4	4.0	6.5	1.5	1.0	5.5	11.5	47.8	4.5	9.5	47.4	3.5	4.0	87.5	71.6	2.5	1.5	2.0	61	38	8	13	3	2	4	2	+39
24	Heat	26.5	2024-25	HOU	2	37.2	3.5	4.5	3.0	1.0	9.5	17.0	55.9	6.5	10.5	61.9	1.0	2.0	50.0	74.1	1.0	2.5	2.0	74	53	7	9	6	2	4	7	+6
25	Timberwolves	22.5	2024-25	HOU	2	41.7	7.0	9.0	0.0	0.5	8.0	20.5	39.0	5.5	11.0	50.0	1.0	2.0	50.0	52.6	0.5	6.5	2.0	83	45	14	18	0	1	4	5	+22