Britton happy ex-Swansea teammate Sinclair made West Brom move
Sinclair left Manchester City last week to join Albion.
"He's a great professional and a great player, but he just needs to go and play games," said Britton.
"I just hope he doesn't score against us. You always talk about ex-players coming back to haunt you - but hopefully that won't be the case.
"Hopefully he will be really rusty and won't last too long.
"It will be good to see Scotty because he played a massive part in getting us to where we are. He scored a hat-trick at Wembley and 27 goals in the season.
"It will be nice to see him playing again because he didn't feature too much at Manchester City."
For the big stories and the banter follow us on Twitter: @tribalfootball