| Grant Williams Rankings 2020-2021 | Stats Glossary  |
| Games with .400 or more Field-goals Percentage | Boston Celtics Record : 17 - 14 | Grant Williams |
| No | Date | Game | Res | Score | Field-goals Percentage |
| 1 | May 28 | vs Brooklyn | W | 125-119 | 1.00 |
| 2 | May 25 | at Brooklyn | L | 108-130 | .500 |
| 3 | May 16 | at New_York | L | 92-96 | .625 |
| 4 | May 15 | at Minnesota | W | 124-108 | .625 |
| 5 | May 11 | vs Miami | L | 121-129 | .667 |
| 6 | May 7 | at Chicago | L | 99-121 | .400 |
| 7 | Apr 30 | vs San_Antonio | W | 143-140 | .750 |
| 8 | Apr 25 | at Charlotte | L | 104-125 | .750 |
| 9 | Apr 22 | vs Phoenix | W | 99-86 | .500 |
| 10 | Apr 15 | at L.A.Lakers | W | 121-113 | .500 |
| 11 | Apr 13 | at Portland | W | 116-115 | 1.00 |
| 12 | Apr 2 | vs Houston | W | 118-102 | .400 |
| 13 | Mar 26 | at Milwaukee | W | 122-114 | 1.00 |
| 14 | Mar 24 | at Milwaukee | L | 119-121 | .500 |
| 15 | Mar 22 | at Memphis | L | 126-132 | .667 |
| 16 | Mar 19 | vs Sacramento | L | 96-107 | .500 |
| 17 | Mar 14 | at Houston | W | 134-107 | .667 |
| 18 | Mar 4 | vs Toronto | W | 132-125 | .778 |
| 19 | Feb 28 | vs Washington | W | 111-110 | 1.00 |
| 20 | Feb 11 | vs Toronto | W | 120-106 | .500 |
| 21 | Feb 9 | at Utah | L | 108-122 | .500 |
| 22 | Feb 7 | at Phoenix | L | 91-100 | .500 |
| 23 | Feb 5 | at L.A.Clippers | W | 119-115 | .500 |
| 24 | Feb 2 | at Golden_State | W | 111-107 | 1.00 |
| 25 | Jan 27 | at San_Antonio | L | 106-110 | 1.00 |
| 26 | Jan 25 | at Chicago | W | 119-103 | .500 |
| 27 | Jan 4 | at Toronto | W | 126-114 | .556 |
| 28 | Jan 1 | at Detroit | L | 93-96 | .571 |
| 29 | Dec 29 | at Indiana | W | 116-111 | 1.00 |
| 30 | Dec 27 | at Indiana | L | 107-108 | .500 |
| 31 | Dec 25 | vs Brooklyn | L | 95-123 | .500 |
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