Pakistan can't afford to lose the ongoing ODI series against South Africa since it is a home series and they have already lost the test series 0-1. Losing the one-day series too can be too embarrassing for them.
On the other hand, South Africa would love to finish off the tour on a high and stamp their authority. They'll be especially eager to prove a point to the cricket world since a few questions have been raised about their vulnerability against spin bowling.
And to top it all, the series is in the balance at 2-2 with one match to go which means the 5th match scheduled to take place at Lahore on the 29th of October is going to be the decider.
Then there is Afridi on one side, who is in smashing form, and there is Gibbs on the other who really gave the Pakistan bowlers some spanking in the 4th ODI.
So take my advice and make sure you catch the match live. If you love cricket, this one is going to be a treat! Atleast, it has all the potential to be one.