Dirk Nowitzki put up his most career points per game against the Celtics, with 24.5 per game.

dirk nowitzki highest career ppg by opponent

OPP	PPG	GP	MPG	RPG	APG	SPG	BPG	TPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	MIN	PTS	REB	AST	STL	BLK	TOV	PF	+/-
Celtics	24.5	37	35.2	8.3	2.7	0.7	0.7	2.0	8.6	17.9	47.9	1.5	3.8	38.8	5.9	6.6	88.9	1,301	907	306	100	27	25	73	87	+279
Knicks	22.5	36	34.4	7.5	2.5	1.0	0.6	1.4	7.9	16.4	47.9	1.4	4.0	35.4	5.4	5.8	92.4	1,240	811	269	91	37	20	51	69	+317
Bulls	22.2	36	35.0	7.3	2.4	0.8	0.8	1.8	7.6	16.4	46.4	1.6	3.9	40.0	5.4	6.2	87.5	1,261	800	263	86	28	29	63	83	+247
Pacers	22.1	36	34.5	7.4	2.1	0.8	1.0	1.7	7.6	16.0	47.4	1.3	3.8	34.1	5.6	6.6	85.6	1,244	795	267	76	27	37	61	88	+184
Jazz	22.0	70	35.0	7.4	2.0	0.9	1.0	1.9	7.7	15.2	50.5	1.6	4.1	38.9	5.0	5.6	90.3	2,449	1,541	520	139	65	72	131	182	+223
Heat	21.6	40	34.5	6.7	2.4	0.6	0.8	1.4	7.6	16.5	45.9	1.5	3.9	39.4	4.9	5.5	89.5	1,378	863	267	97	25	32	54	99	+116
Hornets	21.4	31	33.0	7.8	1.8	0.7	0.9	1.3	7.7	16.3	47.5	1.2	3.3	35.6	4.8	5.2	91.4	1,023	664	241	57	23	29	39	86	+232
76ers	21.3	34	34.7	7.4	2.9	0.8	1.0	1.5	7.4	16.4	44.9	1.5	3.6	41.8	5.1	6.0	84.8	1,179	724	253	98	28	35	52	73	+240
Raptors	21.2	33	33.8	7.2	2.5	0.8	1.4	1.5	8.1	16.2	49.9	1.6	3.8	43.5	3.4	4.1	83.1	1,116	699	239	82	27	45	51	69	+157
Bucks	21.2	34	35.2	8.3	3.2	1.0	0.8	1.7	7.6	16.5	45.9	1.6	4.3	36.6	4.5	5.1	88.4	1,196	720	282	109	33	28	57	68	+183
Pistons	21.1	37	33.3	7.9	2.1	0.7	0.6	1.5	7.7	15.8	48.5	1.5	3.5	42.2	4.3	4.9	87.4	1,232	781	292	79	27	24	54	75	+234
Wizards	21.1	35	34.3	8.0	2.6	0.7	0.8	2.1	7.1	14.7	47.9	1.3	3.2	41.6	5.6	6.3	90.0	1,201	738	281	90	24	27	72	79	+225
Hawks	21.1	38	35.1	7.6	2.1	0.8	0.7	1.6	7.7	16.0	47.9	1.4	3.7	37.9	4.3	5.0	85.9	1,332	801	290	81	31	27	62	95	+155
Suns	21.0	71	34.3	8.0	2.5	0.6	0.8	1.9	7.5	15.7	47.7	1.1	2.8	39.8	5.0	5.6	88.4	2,438	1,494	565	181	45	59	132	186	+178
Magic	20.9	35	33.1	7.0	2.6	0.7	0.8	1.5	7.5	15.6	48.4	1.3	3.1	42.2	4.5	5.4	83.1	1,158	731	246	92	23	27	54	91	+157
Lakers	20.8	69	34.4	9.2	2.3	0.8	0.8	1.6	7.2	15.8	45.7	1.3	3.3	38.6	5.1	6.1	83.8	2,376	1,437	636	159	56	58	108	179	+129
Thunder	20.8	72	33.4	7.3	2.8	0.7	0.6	1.8	7.3	15.5	47.1	1.2	3.7	33.7	5.0	5.6	89.3	2,405	1,498	528	200	51	45	130	170	+312
Rockets	20.7	72	33.0	7.0	2.0	0.8	1.0	1.2	7.3	15.3	47.6	1.2	3.0	39.4	4.9	5.6	88.8	2,375	1,492	507	144	57	72	83	164	+347
Warriors	20.7	71	32.5	7.2	2.4	1.0	0.8	1.9	7.0	14.6	48.2	1.1	2.8	39.6	5.5	6.4	86.2	2,309	1,471	509	171	72	58	136	163	+310
Pelicans	20.6	59	31.7	6.7	2.5	0.8	0.7	1.5	7.4	15.4	47.9	1.3	3.1	40.8	4.6	5.1	89.4	1,870	1,217	393	148	50	42	87	134	+311
Nets	20.6	39	34.8	7.8	2.5	0.8	0.7	1.7	6.9	15.5	44.9	1.4	3.4	41.8	5.2	5.8	89.5	1,359	802	304	98	32	29	68	88	+270
Kings	20.5	69	33.9	7.8	2.8	0.8	0.9	1.6	7.4	15.5	47.5	1.1	3.0	35.6	4.7	5.2	90.8	2,341	1,415	537	193	54	63	107	168	+268
Nuggets	20.5	71	33.5	7.6	2.5	0.8	0.9	1.7	7.4	15.9	46.2	1.2	3.2	36.8	4.6	5.2	89.1	2,377	1,456	541	178	57	65	122	176	+226
Timberwolves	19.8	68	33.1	7.1	2.1	0.7	0.8	1.3	7.1	15.0	47.3	1.4	3.7	36.2	4.3	4.9	87.8	2,252	1,349	481	142	48	54	86	160	+312
Clippers	19.8	69	31.7	6.8	2.1	0.8	0.7	1.8	7.0	14.8	47.6	1.4	3.5	39.1	4.3	5.1	84.2	2,189	1,365	472	144	57	46	121	153	+293