This should be a relatively easy fight for Joyce as when Wallisch steps up to the highest level he loses and he loses quickly.
Joyce may be slow but he is unrelenting and relatively heavy handed. His defense isn’t great but that won’t be a problem in this fight
Wallisch doesn’t have a good defense either and hasn’t shown he has any real power against top level competition. He should be slightly faster than Joyce and if Joyce is very rust due to having a year off he may have a chance early on.
I predict Joyce breaks Wallisch down in 5 rounds after looking rusty in the first two rounds.