Saka is in line to start or be on the bench against Liverpool in the Premier League.
The 23-year-old did not play in midweek against Shakhtar Donetsk and is an injury doubt.
Asked about Saka’s fitness, manager Mikel Arteta stated: “Saka is not training yet so he won't be available.”
Seaman stated on his Seaman Says podcast: “I'm a little bit nervy, if I'm honest, because we're not going to be at our strongest, depending on Saka.
“Although when I was in last Thursday at Arsenal, coaching with the young goalies, I saw Bukayo with his boots on and I was like, "ah, good sign".
“Not trainers or anything like that. He was going off to do some one-to-one rehab, so that was a good sign. Hopefully it's not too bad.”
