Two proud Welsh football fans go head to head in the rivals as their teams' Cardiff and Swansea prepare to clash.
But with the task of surfing to overcome, who will stay afloat?
You can watch the next Sportsround at 6.30pm on Friday on the CBBC Channel.
If you miss it, or really liked it the first time, you can catch it again at 7.25am on Saturday on BBC2.
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