double-fault

Nadal dropped just four points on serve in the opening set and a solitary break in the third game - secured via a Lopez double-fault - proved decisive.

Australian Open 2012: Nadal puts away compatriot Lopez 2012

Williams won the first two games in the second set but then Makarova went on a roll, winning the next four games including the double-fault strewn game at 2-2 when Williams screamed after one and asked herself out loud after another: "How many double-faults do you want to make?"

Australian Open 2012: Serena Williams crashes out in fourth round 2012

Normally calm on court, Federer pumped his fist after breaking for a 4-2 lead only to double-fault when facing break point in the next game.

Nadal outlasts Federer to win his first title at Australian Open 2009

Williams, meanwhile, kept making mistakes, and two backhand errors plus a double-fault contributed to a break at love that put Clijsters ahead 4-2.

Serena penalized for conduct as Clijsters advances to final 2009

After serving a double-fault at 2-2 in the third set, Roddick got a warning for an audible obscenity and told Molina: "I take back the apology."

Federer ousts Roddick from Australian Open 2009

Frailties in tennis arrive in many guises and a tired double-fault by Nadal in the fourth game might have disguised deeper concerns had Fish not so meekly wasted his rare chance to break back.

Rafael Nadal edges past Mardy Fish in ATP World Tour Finals 2011

A rare Nadal double-fault gave Murray encouragement after a wonderful running save on the forehand side put the Spaniard under pressure - and when he dropped serve in the eighth game, the Scot held to become the first player to take a set off Nadal in the whole tournament.

Rafael Nadal beats adventurous Andy Murray to reach US Open final | Kevin Mitchell 2011

She has a huge and big serve, so I was like: 'Please, double-fault.

France Awaits a Perfect Storm Tom Perrotta 2011

Federer was commanding at the start, breaking Tsonga to love in the fourth game and relieved, no doubt, to see the Frenchman double-fault to hand him the set after 21 minutes.

Rafael Nadal edges past Mardy Fish in ATP World Tour Finals 2011

On the second serve, a line judge called a foot fault, making it a double-fault — a call rarely, if ever, seen at that stage of any match, let alone the semifinals of a Grand Slam tournament.

Serena penalized for conduct as Clijsters advances to final 2009