In , I made a comment about HU tourneys being 50% luck. I was just picking a reasonable sounding number out of think air at the time, but I stand by that statement. Here is a fine example for you - two hands from the same match (there was a redonkulous hand before this too (hence stack sizes), but it and it's too annoying to look for it now):
Full Tilt Tournament game, buy-in $200 + 10 Heads Up Sit & Go (19047515), $10/$20 No Limit, 2 players
Hand History by
HERO (BB): T$890
Button: T$2110
Button posts
HERO posts Big Blind T$20
Pre-flop: T

Q

(T$30)
Button calls T$10
HERO checks
Flop: Q

3

8

($40)
HERO bets T$30
Button calls T$30
Turn: Q

3

8

5

(T$100)
HERO bets T$80
Button calls T$80
River: Q

3

8

5

3

(T$260)
HERO checks
Button bets T$240
HERO calls T$240
Button shows 2

7

Button wins T$740 with a flush Queen high
Note that I had actually made a nice comback, since villain was a complete tool...
Full Tilt Tournament game, buy-in $200 + 10 Heads Up Sit & Go (19047515), $20/$40 No Limit, 2 players
Hand History by
HERO (BB): T$1165
Button: T$1835
Button posts
HERO posts Big Blind T$40
Pre-flop: 5

8

(T$60)
Button calls T$20
HERO checks
Flop: 7

6

9

($80)
HERO bets T$60
Button calls T$60
Turn: 7

6

9

6

(T$200)
HERO bets T$160
Button calls T$160
River: 7

6

9

6

4

(T$520)
HERO bets T$340
Button raises to T$1575 and is all in
HERO calls T$565 and is all in
Button shows 5

3

Button wins T$2330 with a straight flush Seven high