The event was a huge success and soon became the social media site’s number one trending topic in the world via the ‘#AskRio’ hashtag, which fans used to quiz the 34-year-old on a variety of subjects including pranks, table tennis and his forthcoming testimonial match at Old Trafford.
To give you a flavour of the online interview, which also included a question from Michael Carrick, we’ve compiled some of the best bits in the transcript below. And remember, you can follow United and Rio on Twitter via the @ManUtd and @RioFerdy5 handles.
Tushar Sinha: How's everything going on inside the team on tour?
Rio: Very hard training, but very enjoyable. Banter is flying on tour. #AskRio
Harry Linehan: Free weights or machines? Treadmill or outdoors?
Rio: Free weights, but I mainly do body weight exercises. Outdoors - my back doesn't agree with treadmills.
Grumpy Gregory: Who do you consider to be the best defenders in the youth squad?
Rio: I don't like to speak about the youth players individually, but Michael Keane looks a great prospect.
Kieron Tierney: Of all the sporting successes by Britain this summer, which was the best?
Rio: All are great, but @andy_murray created a moment that will live in a generation's memories.
Tom Dunlop: Who's the best and worst at ping pong on tour?
Rio: RvP & myself are the best on #mutour, although Robin practices every day. Worst is Zaha coz he can't back the chat!