Anderson did not face a solitary break point and won 91 per cent of points behind his powerful first serve in a 6-3 7-6 (12-10) win in the Group Lleyton Hewitt opener at the O2 Arena on Sunday.
Fourth seed Anderson struck 30 winners and served 13 aces in a powerful performance, claiming the only break of the first set before saving two set points in a tie-break to see off Thiem.
Thiem has failed to make it out of the round-robin stage in his two previous appearances in London and although he showed flashes of his class, the sixth seed was unable to prevent a seventh loss in nine meetings with Anderson.
Anderson stamped his authority on the match with an impressive start, putting Thiem under pressure and getting the break for a 3-1 lead when the Austrian drilled a forehand long.
The towering South African earned another break point with a superbly executed backhand stop volley and although Thiem’s unforced errors were mounting, a battling hold reduced the deficit to 4-2.
Anderson saw another two break points come and go as Thiem got himself out of trouble with glorious winners, but he was a set down after crashing a forehand into the net.
Thiem was not doing himself any favours, though, making unforced errors at key moments - including a glaring miss with a wild forehand at the net - as Anderson made it 4-4 after being let off the hook.
World number eight Thiem saved three match points, but Anderson fended off a second set point with a booming ace and conjured up a majestic forehand winner on the run before sealing the victory with another ace.
STATISTICAL BREAKDOWNAnderson [4] bt Thiem [6] 6-3 7-6 (12-10)
WINNERS/UNFORCED ERRORSAnderson – 30/22Thiem – 23/22
ACES/DOUBLE FAULTSAnderson – 13/4Thiem – 5/3
BREAK POINTS WONAnderson – 1/7Thiem – 0/0
FIRST SERVE PERCENTAGEAnderson – 61Thiem – 58
PERCENTAGE OF POINTS WON ON FIRST/SECOND SERVEAnderson – 91/57Thiem – 80/60
TOTAL POINTSAnderson – 76Thiem – 67
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