More than one in five sporting fans had their enjoyment of last summer's action disrupted by poor broadband.
According to research by ViaSat, 30.2 million UK browsers streamed action from the Rio Olympics on BBC iPlayer and the BBC Sport website.
Figures showed that BBC Sport's Olympic coverage was viewed on 68.3 million devices in the UK alone and on 102.3 million around the globe.
Wimbledon and Euro 2016 also pulled in millions of online viewers throughout the summer.
However, ViaSat found that 21 per cent of sports fans had summer competitions disrupted because of inadequate broadband services.
This proved to be a particular problem in London, with 33 per cent of people in the capital saying poor connectivity ruined their experience of the summer of sport.
As a result, many people are pessimistic about the chances of getting through Christmas without experiencing connection problems spoiling their festive entertainment.
Some 27 per cent of those polled said they are worried about disruption to broadband services this Christmas.
Interestingly, 16 to 24-year-olds are particularly concerned, with 45 per cent of this group expressing worry.
Marc Agnew, Vice President of ViaSat Europe, commented: "Just like charitable giving, festive meals and holiday decor, the internet has fast become a core part of the holiday season.
"For many, it is essential for connecting with far away loved ones; or a way to shop for gifts without having to experience those endless long lines, while for others they will turn to streaming services such as Netflix for their Christmas films, Spotify to soundtrack their New Year’s Eve party, or YouTube for extended Yule log fireplace videos."
The survey comes shortly after Ofcom revealed around 9.1 million homes now have superfast broadband connections, compared with eight million a year ago.