Celtic sustained their heaviest ever home European defeat as Neymar led the way for Paris St-Germain in the Champions League group stage opener.
The world's most expensive player coolly finished and then had a hand in PSG's second, which was finished emphatically by Kylian Mbappe.
Edinson Cavani converted a penalty for the visitors' third before the break.
Mikael Lustig's own goal was followed by Cavani's second of the night, a superb diving header.
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