At issue is the initial diagnosis of Dr. Brian McKeon, the Celtics team physician who has told Smart he suffered a torn ligament in his right thumb.
Kyrie Irving will miss Wednesday's game against the Washington Wizards with knee soreness, according to ESPN's Chris Forsberg. Sports reported Monday that Smart has a torn tendon and will seek a second opinion.
Surgery is considered a possibility for Smart, but the Celtics aren't sure yet what will be necessary.
The C's hard-nosed guard injured his thumb during Boston's loss to the Indiana Pacers on Sunday night. Though there's still a good chance Smart will re-sign, he will first have to test the market. Despite making a season-high-tying six of his 12 3-point attempts on Sunday, Smart is shooting just 30.1 percent from long distance this season and 36.7 percent overall.
(16) LIU-Brooklyn vs. (16) Radford
Radford also held Blackbirds' leading scorer Joel Hernandez to eight points, 12 below his season averaged of 20 ppg. But the Highlanders played well and won the conference tournament as the second seed.
Volkswagen assigns $24 billion in battery orders to speed EV push
Yet, Muller said electrification does not mean the firm is moving away completely from conventional technologies. Unlike some of its competitors, Volkswagen isn't going entirely in on electric vehicles - for now.
Vikings come to terms with Kirk Cousins
Case Keenum - who quarterbacked the Vikings to an NFC North title in 2017 - is set to sign with the Broncos in free agency. When injuries and other factors led to Griffin leaving Washington, Cousins became the full-time starter.
Irving has been healthy for most of the season but the knee injury is cropping up at a bad time.
The 24-year-old is averaging 10.2 points, 3.5 rebounds and 4.8 assists over 54 games, including 11 starts, this season, his fourth with the Celtics.
In the final hour: Don't look now, but the injuries are mounting for the Celtics this week.