The Bundesliga club were held to a goalless draw by Fluminense in their tournament opener and it has left them with work to do in their bid to qualify for the knockout stages.
The Sundowns, the current South African champions, were deserved winners over Ulsan in their first match and it means they sit top of Group F after the first round of matches.
This, though, is a big step up from that match and they will need to pick up a result against either Dortmund or Fluminense if they are to make it out of the group.
Jobe Bellingham made his debut for Dortmund last time out and he will be hoping to make more of an impression here.
How to watch Mamelodi Sundowns vs Borussia Dortmund
Live stream: Viewers can watch the action live online via the DAZN website. Kick-off is at 5pm BST this afternoon.
DAZN is the global broadcaster of the new-look Club World Cup. No subscription is required to watch the game, with the entire tournament available to their ‘Freemium’ members, which means you only need to sign up for a free DAZN account.
