Limiting the Senate damage to two seats with this map (assuming FL holds for R) was very strong. This puts the Senate in play in 2020.
2020 will see 20 Republicans and 12 Democrats defending (Dems would have to flip 3 of them). Republican seats that we can already predict will be strongly threatened include Cory Gardner (CO), Thom Tillis (NC), and Dan Sullivan (AK), while on the Democratic side Mark Warner (VA), Jeanne Shaheen (NH), and Doug Jones (AL) are the obviously vulnerable ones. Those are just the senators that won by small margins last time (or in a competitive special election). If things go really titty on us, you could see fights for seats like Pat Roberts in KS, or Tina Smith in MN. I don't think things will get crazy enough to threaten Lindsey Graham (SC), Susan Collins (ME) or John Cornyn (TX) but you never know.
And 2022 looks quite a bit worse for Republicans, should they hold on in 2020. Ironically the best chance Republicans have of holding the Senate past 2022 is if Trump loses reelection.