After firing a warning shot, Australian young gun Kyle Chalmers now has history in his sights at the Rio Olympic pool.The 18-year-old upstaged world No.1 and teammate Cameron McEvoy to be second fastest in the 100m freestyle semifinals on Tuesday night.He trailed only the man who denied Australia 100m gold at London - American Nathan Adrian.Few would rule out McEvoy as a chance to become the first Australian to claim the 100m Olympic title since Michael Wenden in 1968.But few have seen anything quite like Chalmers before, either.After setting a junior world record to be fastest in the heats, Chalmers backed up hours later to shatter the mark again by clocking 47.88 seconds.The time would have won silver at the 2015 world titles in Russia.Defending champion Adrian bounced back from an ordinary heat that almost cost him a semifinal spot by topping the timesheets in 47.83.McEvoy was third fastest in 47.93.In a repeat of his heat, Chalmers was well behind at the 50m turn but again flicked the switch to win his semifinal comfortably.Thats how I swim. I swim to my strengths, and my strength is my back-end, Chalmers said.But I probably didnt expect to get through to the final, especially in that time.Plenty of pressure will now be on Chalmers and McEvoy to end Australias 100m drought at the Olympics.Something Eamon Sullivan and James Magnussen could not do despite entering the last two Olympics as red hot favourites respectively.But instead of dreaming of history, the mild mannered Chalmers simply wanted a good nights sleep.Asked about his chances, Chalmers said: I am probably trying to wind down, block it out of my mind completely, otherwise I will be up all night.McEvoy arrived at Rio as the red hot favourite after clocking 47.04 at Aprils Rio trials - the third fastest of all time and quickest outside a supersuit.But Chalmers blistering speed at his first Olympics has ensured the form guide will be thrown out the window in Wednesday nights final.At least McEvoy wont have to worry about the man who denied him 2015 world titles 100m gold.Chinas Ning Zetao (12th, 48.37) failed to make the final.Meanwhile,?Australias Emma McKeon won bronze in the 200m freestyle final behind Americas?Katie Ledecky and?Swedens Sarah Sjostrom Vapormax Moc 2 Sale .Y. -- Bills receiver Stevie Johnson has a bone to pick with the NFL schedule maker. 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Quinton de Kock believes hes played better innings than the brutal 178 that destroyed Australias bowlers to deliver victory for South Africa in the first ODI at Centurion.On a friendly pitch, de Kock was able to capitalise on Australias failure to mount a truly intimidating score after a fast start. He also took advantage of a visiting bowling attack that had been weakened by the resting of Mitchell Starc and Josh Hazlewood.It was the most free [flowing] knock that Ive played, de Kock told reporters after the match. But Ive played a couple of other knocks that Ive enjoyed more, where Ive had to work hard for the runs.Those are the type of knocks that I enjoy. I had to work hard for the runs today, but it was just my day I guess. The wicket was quite nice to play on, it allowed me to play my natural game. Hopefully there will be a couple more wickets like that in the series. Then we can have some more fun.Though he conceded the bowling was not up to scratch, Australias captain Steven Smith was more concerned by the way his batsmen were unable to mount a large enough total.dddddddddddd In the absence of Starc and Hazlewood, Smith is aware big scores are required.I thought we started off quite poorly with the ball, we gave him a few freebies to get away, Smith said. We were a bit too short and a bit too wide at times. And from there it just looked like he got in a rhythm, and it felt like every ball was going to the boundary at one point.We got a nice wicket to bat on and we gave some opportunities away. We got a lot of starts and nobody was able to go on and get a big score like Quinton de Kock did. So going forward its the responsibility of one of our top four to post a big total, and if we do that then the team total is going to be big as well. ' ' '