So here's the situation around this match:
WK is able to play at weekends only.
AG is able to play at Fridays only.
The only Friday WK can play in near future is 8.01.2016. Actually, we can play at any day up to 11th January. If we won't do it in our winter holidays (i.e. until 11.01.16), I'm afraid, this match won't happen in uncertain period of time.