This is the sun-sentinel article I dug up. The bolded part is what scoobs is referring to, completely agree.
OT: interesting info about malisse and his future in the article too.
At Delray ITC, Gulbis hopes new attitude helps him reach potential
Many tennis observers believed that when Ernests Gulbis won his first ATP title at the Delray Beach International Tennis Championships in 2010 it would springboard him to stardom.
Instead, the enigmatic son of Latvian millionaire businessman Ainars Gulbis reverted to his underachieving ways and plummeted from a career-high 21 in February 2011 to No. 109. So he needed to win his third qualifiying match on Monday just to get into the 32-player draw at the ITC this year.
Gulbis, 24, who has flashed top-10 potential since turning pro at 16 but has never cracked the top 20, admitted he preferred partying over practicing, and actually didn't really like tennis.
However, a very thin 6-foot-3 Gulbis, who hired renowned coach Gunther Bresnik last June, said he has finally found the motivation to get in shape and fulfill his potential.
"I was really getting pissed to see who's in the top 100,'' Gulbis said after squeaking out a three-set victory over Denys Molchanov. "There are some guys who I don't know who they are. Some guys, I'm sorry, with respect — they can't play tennis.
"I don't know how they got into the top 100. It's tough, but I think I'm much better than them and I just want to prove to myself by the rankings, also. It's a motivation.''
At 19, Gulbis reached the quarterfinals of the French Open. Four months after winning the ITC in 2010, he shocked then world No. 1 Roger Federer en route to the semifinals of the Rome Masters 1000.
In 2011, he captured his second title in Los Angeles, and last summer he fired 30 aces to stun No. 7 Tomas Berdych at Wimbledon before losing to No. 136 Jerzy Janowicz. However, he hasn't gotten out of the second round in his last 17 Grand Slams.
His career bar graph appears to be drunk.
"This is the first year I really want to do this,'' Gulbis said. "I'm starting to enjoy tennis much more. Before I didn't like it, honestly. I had a couple of good wins and enjoyed it. Then I went on the wrong path and was doing wrong stuff for my game.
"Now, I want to play maybe five more years and do the best I can.''
Former top-10 plater Jimmy Arias, now working for TennisChannel, needs to see proof.
"He's got the game, he's got power, he's got all the shots,'' Arias said. "Obviously, it's mental. He just doesn't seem to have the motivation. I remember when he came on the tour, I thought this guy is a top-10 player. He hasn't even been close, but there could be great things for his future.''
Gulbis is coming off close losses to Berdych and No. 7 Juan Martin del Potro in Marseilles and Rotterdam.
"My goal is to really win something big,'' Gulbis said. "If not this year, next, if I'm doing things the right way like I have the last half a year … it's going to pay off eventually. It's going to come.''