Defending Aviva Premiership champions Leicester survived a huge scare to recover from 11 points down with 16 minutes remaining to beat top-flight new boys Exeter 37-27 at a mightily relieved Welford Road.
The Chiefs had won their first-ever top-flight fixture against Gloucester last weekend but few gave them any chance against a Tigers side that had lost just once in 34 home games.
But Rob Baxter's side refused to be intimidated by their big-name opponents and deservedly led 20-10 at the interval after two fine tries from centre Phil Dollman and two penalties and two conversions from kicking prodigy Gareth Steenson.
Geordan Murphy had claimed the first try of the match for the stunned Tigers, whose line-out at times bordered on the shambolic. Jeremy Staunton converted and added a penalty before the break.
Staunton, who ended with 17 points, kicked two penalties early in the second half to cut the gap but a fine solo try from wing Mark Foster saw Exeter stretch away.
But Leicester showed trademark resolve and summoned converted tries through Scott Hamilton and Dan Hipkiss to turn the game around in the space of five minutes, with a late penalty try ensuring they avoided starting a league season with back-to back defeats for the first time.