Sometimes players who spent their careers at the top aren't necessarily cut out for a life at the top in management. At present Giggs' future foray into management could easily go either way - we just don't know. But what is certain is that it's a mistake to automatically assume that he'll be a success.
Look, it's the New Year, it's that time of year to make some wild predictions and spend the next 12 months trying desperately to justify them, before giving up and trying to hide them by the time it gets to November and December. Then you go and do it all again in January. It's basically tradition... In that spirit, here's a nice, clear prediction that's next-to impossible to weasel out of: Chelsea will finish 2016 at the top of the Premier League table.
Jose Mourinho is the name on everyone's lips at this moment in time after his recent sacking at Chelsea. After United were beaten by Norwich, a few excitable individuals managed to convince themselves that Mourinho would be in charge at Old Trafford by the time Chelsea visit on 28 December.
How can it be possible that, having overseen the worst opening third of a Premier League season of any defending champion, Mourinho, the man so blatantly at fault for much of the those failings, can be so absolved of any blame whatsoever?
José Mourinho has been dismissed as Chelsea manager a mere seven months after lifting the Premiership trophy with his triumphant team at Stamford Bridge. And it's a good thing. A very good thing indeed.
Chelsea and Diego Costa appear to have reached a critical point in their relationship. The misfiring striker was benched for the weekend trip across London at Tottenham and responded petulantly when he didn't make it onto the pitch at all.
While the chasing pack are always keen to close the gap and attempt a coup, a champion's biggest challenge comes from within. And in the early weeks of Chelsea's horrific first third of the new campaign, it was obvious that this was not a challenge they were ready for.
Mourinho knows where the problems are in his team, is one of very few managers in the world whose track record suggests that he's got the skills to turn the current situation around and is stubborn enough to make the changes that are needed. If nothing's changed by, say, March, then the conversation becomes very different. But until then, as the kids say, #JoseIn.
Mourinho finds himself in perhaps his most testing time as a manager, but, more than ever, he needs his players to show exactly why they are champions and stop hiding from the cataclysmic disaster that is their current campaign.
The Premier League is highly regarded for its competitiveness, where anyone can genuinely beat anyone else on a given day - that kind of thing rarely happens in Spain and other European countries. There is no mystique or aura for defending English champions and it all means that when the naivety kicks in, as it has done in recent years, giants will always fall.
If it was naive to think that Chelsea were automatically favourites to win a second successive Premier League title ahead of the 2015/16 season - and it most certainly was - it's even more naive to think that now. Quite simply, Jose Mourinho's team have been left behind by their competitors and a terrible transfer window has now left them playing catch-up.
Chelsea manager Jose Mourinho is well known for being controversial throughout his career, but his latest outburst has left people baffled and annoyed...
Mourinho has failed to get the best out of Andriy Shevchenko and Fernando Torres before now. They, of course, weren't his own choice of players, but there is little evidence to suggest he will have any more success with Radamel Falcao.
With the quality players they have Chelsea had a good chance of beating United in a straight fight, but the players went out on the pitch prepped not to lose, rather than to try and win - the fact that they did get the three points was more a happy coincidence than anything else.
Like the spectacular solar eclipse that many were fortunate to witness the previous day, last Saturday's extraordinary day of rugby was an event made more memorable by its rarity...
Mourinho has the capacity to manipulate the media and to direct the press' attention where he sees fit. It is an attribute that so few top-flight managers possess but in modern football, it can be an essential tool in the coach's artillery.