The greatest unknowns for the Celtics in 2023-24 are as follows.

Celtics fans have high hopes for the 2023-24 NBA season. Jrue Holiday, Kristaps Porzingis, Jayson Tatum, and Jaylen Brown make the C's a title contender with the league's greatest top-six.

Even with a stacked roster, X-factors might decide Boston's title hopes. Naturally, Tatum and Brown will lead. Holiday will likely score consistently and play All-Defensive. The three players' output is predictable.

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Who are Celtics' X-factors for the next season? These players have more options and might decide if Boston hosts Banner 18 at TD Garden next summer.

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Porzingis would be No. 1 on certain teams, but he's happy as No. 3 behind Tatum and Brown. He seems to be doing well in that capacity.

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The 7-foot-3 big man, acquired in June's blockbuster Marcus Smart three-way trade, has excelled on both ends of the floor in preseason. With defenses focused on the Jays, Porzingis has gone 8-for-13 from 3-point range in three games. With three blocks, he protected the rim.

Before Porzingis, the Celtics had a top offense. This starting lineup will be unstoppable with "The Unicorn" in the mix. An unexpected injury might ruin the enjoyment.

Porzingis is Boston's No. 1 X-factor because to his brilliance, injury history, and frontcourt depth problems. His 65 games played last season was his most since 2016-17. A summer injury concern with plantar fasciitis kept him out of the FIBA World Cup.

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After trading Robert Williams III to Portland for Jrue Holiday, the C's have 37-year-old Al Horford and Luke Kornet as their frontcourt depth behind Porzingis. Porzingis' health might determine the Celtics' Banner 18 prospects.

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White remains undervalued despite a stellar 2022-23 season and postseason with Boston. ESPN mysteriously omitted the All-Defensive selection from its Top 100.

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White will want to prove his worth as a key Celtics player this season. D'Angelo Russell said White "doesn’t get a lot of credit for what he does" and "makes all the winning plays." His presence is felt every time he plays, whether starting or benching.

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After trading Robert Williams, the Celtics are in that situation. A 37-year-old who ran out of gas in the second part of last season and an ailing Porzingis lead the frontcourt. If either big man is hurt, that would be devastating.

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The 25-year-old guard, who signed a four-year agreement last month, has been the preseason standout. He has made at least three 3-pointers in all four games, converting 16 of 41 long-range tries (39%). He averages 18.8 points in 24.5 minutes.

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