All right...I expect this will be a popular duel.
So we have Gwok Jing from mid-LOCH, particularly the time shortly after he and Wong Yung first met South Emperor 1 Deng and just before they discovered that the Gong Nam 5 Freaks were murdered on Peach Blossom Island vs. Yeung Gor from mid-ROCH, before he lost his arm, but after his first visit to Passionless Valley (e.g. when he was trying to protect newborn baby Gwok Seung from Lee Mok Sau and the Golden Wheel Monk).
How does this duel go?