Arscott (r): Full-back duties for Chiefs

That would then set the scene for a crunch clash between the Chiefs and Saints in Devon on Sunday week.

"The reality, as we've said to the players, is that we are now at the business end of the season and we are still fighting for things," Exeter head coach Rob Baxter said.

"A week ago we were in Paris fighting in a quarter-final of a European cup competition, and now we are fighting to see if we can establish ourselves either in the Heineken Cup or that top four.

"Saturday is another great opportunity for us, but the key is not to look too far ahead of ourselves and instead concentrate fully on Worcester.

"We know going up there will be a very tough game because they have a very good home record."

Flanker Neil Best is back for Worcester, making a first appearance since breaking his arm in November. Elsewhere, lock Chris Jones is sidelined through concussion, so Craig Gillies takes over, and wing Miles Benjamin is back in the starting line-up.

Exeter's Wales international prop Craig Mitchell misses the trip to Sixways because of a shoulder injury, so Hoani Tui moves across the scrum and Ben Moon starts at loosehead. Centre Jason Shoemark is also absent injured, with Phil Dollman wearing the number 12 shirt and Luke Arscott taking over full-back duties.