Exeter Chiefs beat Wasps in Premiership final extra-time tension

• Wasps 20-23 Exeter (aet; score at 80min 20-20)• Exeter’s Gareth Steenson stays cool after Wasps fumble their way to defeatA final between the two most prolific teams in the Premiership was decided by a kick rather than a try. Gareth Steenson’s penalty three minutes from the end of extra time after Wasps – who by then had lost both their tight-head props to injury – had infringed at a scrum for the seventh time, settled a full-blooded but scrappy encounter that saw Exeter crowned champions seven years and one day after they won promotion to the Premiership.Exeter were unbeaten in the Premiers…