Exeter Chiefs assistant coach Rob Hunter admits the Premiership leader's home form has been crucial after just one loss at Sandy Park in 2015.
The impressive Devon-based outfit dispatched Sale Sharks on Saturday to move into first place in the table, with Saracens set to play on Sunday.
Hunter added that their home record was no stroke of luck – even if a tricky wind had made things difficult in Saturday's win.
"That [fortress] label is very nice for our supporters because when they come here we want to ensure that they see their side play well and win," he said.
"We have a good record here because of what we do on the pitch.
"We have a bit to work on after this game especially as we travel to Northampton on New Year's Day – and they lost, so they will be keen to put on a show for their supporters.
"If you are playing into the wind it is very hard work but if you are in touch in or around half-time then you have a chance.
"It is really difficult for both sides to play into that because the throwing and the kicking just goes out the window."