Controversial Australian player Bernard Tomic insisted his sluggish movement was from being "flat" from his pre-season training, rather than from being sick or carrying an injury, following his early exit from the Brisbane International.

Tomic had his Australian Open plans up-ended by a first-round Brisbane International loss yesterday.

The lanky Tomic's movement was all at sea in his first match of the year as he took a 6-3, 7-5 loss to Spain's former world No3 David Ferrer.

Tomic, a Brisbane semi-finalist in 2012 and 2016, made 24 unforced errors in the first set compared to only six by a baseliner who has amassed $US29 million in prizemoney mostly by minimising his errors and making his opponent hit one more ball.

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Ferrer asked Tomic if he was ill when they came to the net at the end of the match and was told he was not.

"I was fairly flat. I practised a lot," Tomic said.

"I'm never going to be the fittest player on the tour.

"I'm [196cm] and I have to rely on different things like my serve and today I served terrible.

"But I lost to a top player, one of the best of the last six or seven years," said Tomic.

Meanwhile, another controversial Australian, Nick Kyrgios, overcame a minor basketball injury to open his year with a crushing 6-3 6-4 win over Spain's Feliciano Lopez at the Hopman Cup in Perth.

Kyrgios entered the match with strapping just below his left knee after taking a tumble while playing basketball a few days earlier.

The world No13 brushed off the discomfort to put Lopez to the sword in a match that lasted 65 minutes.

Kyrgios powered down 14 aces for the match, and raced through the first set in just 23 minutes.

The 21-year-old was surprised at how well he'd played given he had reduced his on-court practice time during the off-season, and instead focused on boosting his fitness.

"I felt like I was going to be a bit rusty at times.

"But I played really well today," Kyrgios said.

"It's surprising because I haven't been doing much on the court.

"I've just been trying to get into a good head space and be ready.

"I was really happy with the level today."