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A group of 50 Juventus fans clashed with police outside the Delle Alpi stadium, shortly before their Champions League game against Liverpool.
Fans pelted around 100 police officers with various missiles including flares.
A car was in flames near the scene of the clash as police sought to bring the situation under control.
Fears had long been raised that some Juve fans would cause trouble at the game, seeking revenge for the 1985 Heysel Stadium tragedy.
On Tuesday, police arrested eight Juventus fans for violence and possession of arms after a Liverpool supporter was hit on the head with a bat at a Turin bar.
Tempers also flared at a hotel when Juventus fans arrived, reportedly carrying bottles and a stick.
Words were exchanged, but no fighting occurred and the Juventus fans ran from the scene when the police arrived.
More than 900 officers will be at the Stadio Delle Alpi in the wake of Tuesday's fan trouble, which caused the AC Milan v Inter Milan quarter-final to be abandoned.
But Italian counter-terrorism chief Giuseppe Petronzi told BBC Radio Five Live that police were ready and prepared to deal with "the highest level of risk" in Turin.
"We have reason for concern, but I'm confident we can manage the situation," he added.
Liverpool chief executive Rick Parry has already urged his fans to be on their best behaviour.
"Every fan in Turin should remember they are an ambassador for the club," he said.
But fears about the quarter-final grew after Tuesday's trouble in Milan and also when a number of Juventus fans rejected Liverpool's first-leg apology for the Heysel disaster by turning their backs on it at Anfield.
A total of 39 people died during the 1985 European Cup final between the two sides.
And Petronzi acknowledged that threats of retaliation had appeared on the internet.
"We have paid a lot of attention to what they have written and now we must see if they want to do what they have written," he said.
"I have good reason to expect that this situation will not happen and if it does, we have the proper tools to avoid a dangerous situation."
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