Unforced

Unforced Rossini tenors are a rare breed, and it was a treat to hear Mr. Flórez navigate the vocal extremes of the role, popping out high C's while adopting a rascally but winning demeanor.

A Naughty Romp From Rossini Heidi Waleson 2011

Unforced errors begin to worm into his game as he squanders three set points to let Querrey back into the contest.

Andy Murray v Sam Querrey - as it happened! 2010

Unforced errors aren't strangers to Democrats either, of course.

Michael Sigman: Repubs Outdo Dems in Unforced Errors 2010

Unforced errors aren't strangers to Democrats either, of course.

Michael Sigman: Repubs Outdo Dems in Unforced Errors Michael Sigman 2010

Unforced errors aren't strangers to Democrats either, of course.

Repubs Outdo Dems in Unforced Errors 2010

Unforced errors and wild play gave the 19-year-old Jackson the early lead.

USATODAY.com - Belgium out to 2-0 lead on U.S. after singles wins 2006

Hardenne Pierce 1st serve percentage 56 69 Aces 2 1 Double faults 3 5 Unforced errors 15 29 1st serve winning pct. 83 45 2nd serve winning pct.

USATODAY.com - Henin-Hardenne dusts Pierce for French Open title 2005

Mariano Puerta, 6-7 (6-8), 6-3, 6-1, 7-5 Nadal Puerta 1st serve percentage 79 61 Aces 7 4 Double faults 3 2 Unforced errors 28 54 1st serve winning%. 68 64 2nd serve winning%.

USATODAY.com - Teen Nadal gives Spain reign over French Open 2005

Unforced internal variability — think of it as the “weather” in the climate model.

More Unthreaded « Climate Audit 2007

Unforced errors have been her downfall in most of the matches she has lost lately, but when she is on, no one in the world can withstand her power.

USATODAY.com 2005