The 18-month suspension, which he received after mistakes in residence reporting, meant that all ranking points disappeared.
Now Mikael Ymer has to hope for a wildcard to play tournaments.
But in Sweden's Davis Cup team, he is a given.
"Means incredibly much"
In the qualifying match against Australia at the Royal Tennis Hall, the 26-year-old gets the chance in the first match, against world number seven Alex de Minaur.
It means incredibly much, said Simon Aspelin, Sweden's DC captain, about Ymer's comeback during a press conference earlier in the week.
In DC contexts, we want to be with and measure ourselves against the best countries, which we have done for many years before and want to continue with. It means a lot that "Micke" is with.
For Mikael Ymer, who in last week's comeback won an ITF tournament in Luxembourg, it was despite limited playing time given to be in the Davis Cup.
"Of course"
For my part, it was obvious, then it's not me who selects the team. The association wanted me here, it was clear I said yes. Playing Davis Cup has always been a big thing for me and above all my dad, he said.
I think those who selected me knew about my level, they have anyway followed me and my training. I think they knew what they were doing.
Aspelin, Ymer & Co are counting on a tough match against Australia, which is second on the Davis Cup ranking. Sweden is 18 places worse.
We have players in the team who are incredibly form-strong and who are really keen on going in and making a good match against an incredibly tough team, said Aspelin.
The DC match starts at 5:00 pm on Friday and continues with matches on Saturday. The winner advances to the next qualifying round, and will then face Chile or Belgium.
Friday: Mikael Ymer–Alex de Minaur and Leo Borg–Aleksandar Vukic.
Saturday: Filip Bergevi/André Göransson–Matthew Ebden/John Peers, Leo Borg–Alex de Minaur, Mikael Ymer–Aleksandar Vukic.