Recent polls for the GA US Sen. Elect. Runoff show Ossoff-D&Warnock-D leading by a 4 percent margin.

If both of these candidates win on Tuesday, Democrats are going to regain control of the US Senate in 2021. 50-50 tie with VP Harris-D breaking the tie vote.
In 2022, Democrats will retain control of the US Senate.
Democratic held US Senate seats up for re-election in 2022 from the most vulnerable to the least vulnerable.
GA(Warnock-D)50
AZ(Kelly-D)49
NV(Cortez Masto-D)48
NH(Hassan-D)47
CO(Bennet-D)46
OR(Wyden-D)45
IL(Duckworth-D)44
WA(Murray-D)43
CT(Blumenthal-D)42
NY(Schumer-D)41
CA(Padilla-D)if he faces a Republican in November 2022 General Election.40
HI(Schatz-D)39
MD(Van Hollen-D)38
VT(Leahy-D)37
GA(Ossoff-D)36- Not up for re-election in 2022.

Those US Senate seats are likely to remain in the Democratic column in 2022.
Republican held US Senate seats up for re-election in 2022 that is likely to go Democrat.
PA(OPEN Toomey-R)
Fetterman-D
Shapiro-D
Lamb-D