The player Sharapova beat in last year's final, Sara Errani, also eased into the second round.
Serena Williams is already into the second round with a straight sets win over Varvara Lepchenko.
The 22-year-old lost in qualifying but earned a bye into the second round when Serena Williams withdrew injured.
The victory put Williams into the second round as she continues her recovery from Sjogren syndrome, an auto-immune disorder.
But Shields took a two-point lead into the second round, and her superior speed proved too much for Volnova.
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Whichever candidate Mr Susilo faces, he goes into the second round the favourite.
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Fifth seed David Ferrer is also safely into the second round after a 6-3 6-4 6-3 win over Belgium's Steve Darcis.
Fury's disdain cost him when he was dropped 18 seconds into the second round with a right hook to the chin.
World number two Jelena Jankovic is looking forward to her first match in Cincinnati after being given a bye into the second round.
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Fifth seed Roger Federer, of Switzerland, also coasted into the second round after overwhelming Russia's Denis Golovanov 6-0 6-1 in just 38 minutes.
Venus will next play Canada's Aleksandra Wozniak, who progressed into the second round by winning 6-2 6-1 against Marina Erakovic of New Zealand.
Fifth seed Mardy Fish maintained the form he showed last week by moving into the second round with a comfortable win over Julien Benneteau.
In a surprise result in Sao Paulo, high-profile former champion of consumer rights, Celso Russomanno, failed to make it into the second round of the mayoral election.
The American showcase nearly turned into a disaster for Fury, who was dropped 18 seconds into the second round with a right hook to the chin.
St-Pierre landed another takedown 40 seconds into the second round and soon had Diaz on his knees face down again, hitting him with knees and punches.
Wozniacki, who had received a bye into the second round, was beaten by Zheng's aggressive tactics with the Chinese hitting twice as many winners as the Dane (34 to 17).
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Flyweight Yafai, who received a bye into the second round in Beijing, was always trailing and struggled to impose himself on the fight as he slipped to a 9-3 defeat.
Japan appointed Italian coach Alberto Zaccheroni after Takeshi Okada stood down in July, having taken the "Blue Samurai" into the second round of football's biggest tournament before losing on penalties to Paraguay.
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Meanwhile, top seed Marin Cilic won his opening match at the BMW Open in Munich, moving into the second round as he completed a rain-delayed 6-4 6-2 victory over Michael Berrer on Wednesday.
With his three goals against Tranmere two weeks ago, he has now scored six goals in two games, to help Bournemouth into the second round of the FA Cup and third in League One.
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Wozniacki will now head to Sydney to get in some match practice ahead of the Australian Open, while Russian-born Pervak goes into the second round at Brisbane for the first time in four attempts.
The top seven seeds receive a bye into the second round and the world No. 5 Juan Martin Del Potro made hard work of his place in the third round after a battle with Ukrainian Alexandr Dolgopolov.
Hungary's Agnes Szavay walked into the second round when Olga Govortsova of Belarus retired hurt while trailing 6-3 1-0, and will face third seed Yanina Wickmayer in the second round if the Belgian beats Croatian wildcard Petra Martic.
It sent AFC Wimbledon - formed in 2002 by fans opposed to the Football Association's decision to allow 1988 FA Cup winners Wimbledon FC to move to Milton Keynes - into the second round of the FA Cup for the first time in their history.
And Wigan stretched 12-4 nine minutes into the second half when Richards swept round Steve Tyrer's poor tackle to score in the corner before tagging on the conversion.
Te'o was considered a late first-round or early second-round pick heading into the draft, which he did not attend.
He beat her into second place in the first round by 33% to 26%.
Pittsburgh got into position to advance to the second round for the first time since 2010 when it won 4-0 in Game 5 with Vokoun in goal instead of Marc-Andre Fleury.
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