McGrath was in the England team when Anderson made his Test debut against Zimbabwe in 2003 and said it was “an amazing achievement that he’s still playing at the top, top level”.
He does not believe anyone else will come close to Anderson’s 700 Test wickets for England or be able to play for the national side to a similar age – but said Porter is also worthy of consideration as a possible replacement.
“Jamie Porter was mentioned a few years ago and just missed out, probably because Jimmy and Stuart Broad were doing what they were doing,” McGrath said.
“He’s had a couple of quiet seasons, but last year, and the way he’s started this year, Jamie’s been back to his best and he’s still young enough to play. He’ll certainly be in the conversation.
“There are a lot of other good bowlers around the counties as well and I’m sure their coaches will be saying the same things as I am. I think it’s exciting because it gives guys a chance to stand up and show they can do it at that level.”