DALLAS, TEXAS?Filipino ring king Manny Pacquiao said his lightning fast speed would be enough to nullify Joshua Clottey?s size advantage when the two meet here in Texas on Saturday (Sunday in Manila).

?My quickness will be the key, my speed,? the seven-time world champion told Reuters as he prepared for a public workout in front of a throng of fans.

However, the WBO welterweight champion is not taking his Ghanaian opponent lightly.

?You cannot underestimate Joshua Clottey,? he said. ?He?s a good fighter, and he?s bigger than me, and I have to be very focused in the fight.?

?Skills win fights?

Pacquiao?s trainer Freddie Roach acknowledged that former IBF title holder Clottey, a natural welterweight, had a size advantage over the champion, who began his career forty pounds lighter.

?But I don?t think size wins fights,? Roach said. ?I think skill does. He may be a little stronger than Manny on the inside, he might hit a little harder, but I think our speed will nullify that.?

Roach said he had been watching footage of Clottey?s fights and had identified a few key habits that he and his fighter intended to exploit.

?He?ll wait for you to throw a combination and then, when you?ve stopped, he?ll throw back. So if you stand in front of him, you?re an idiot,? he said. ?We?re not going to do that. He?s not going to be able to find us.?

?Sometimes, he uses his head,? Roach said of Clottey, 35-3 (20 KOs), whose first defeat came when he was disqualified for head butts.

?If you fall into the pocket with him, his best punch is an uppercut and his second best punch is a head butt. So we?re not going to go in there. We?re going to fight him at distance.?

?Amazing? turnout

A crowd of several hundred watched Pacquiao?s workout, a turnout that a beaming Pacquiao, 50-3-2 (38 KOs), described as ?amazing.?

The fight will be the first to be held at Cowboys Stadium, with 45,000 spectators expected to attend, and the Filipino said he was looking forward to the opportunity to show his skills in front of such a large audience at a new venue.

?I?m very excited to fight in Cowboys Stadium, especially because this is the first fight there,? Pacquiao said. ?It?s an honor to fight in Dallas. I can?t wait until Saturday. This is for the fans. This is my chance to show them what I can do.?