Fighting Senator Manny Pacquiao, the world's only 8-division champion, will defend his world welterweight title against Horn on July 2 in Brisbane, Australia.
The Brisbane boxer will continue his preparations today by sparring Mackay southpaw Liam Paro.
Horn’s preparations were curtailed last week by a head cold that forced the cancellation of a sparring session on Thursday.
Horn, 29, is adamant that Pacquiao, 38, is underestimating him, believing that the undefeated Fighting Schoolteacher does not have the experience to cope with a boxer who has won 11 world championships across eight divisions and amassed an astonishing half a billion dollars in prizemoney and endorsements over the last 22 years.
``I can tell by his body language that Pacquiao thinks he already has the fight won,’’ Horn said.
``I’m planning to give him a big surprise.’’