I started making so many unforced errors and the set was gone probably in 10, 15 minutes.
Her serve was off, and she made 37 unforced errors.
He made a stupid unforced error in the second set and lost focus as a result.
He made 13 unforced errors, just 3 in the first set.
In the second set, she committed only seven unforced errors.
Cut out the unforced errors and you stand a chance.
He had 57 unforced errors, with 19 coming in the fifth set.
Williams made 32 unforced errors: an average of nearly two a game.
She never played good the whole time and had 40 unforced errors.
She committed 31 unforced errors in the second and third set.