Looking at the pattern, my opponent has chosen paper 4 times, scissors 4 times, and rock only once. Additionally, in the last round when I finally won, my opponent chose paper. There's a good chance they'll switch to rock after losing with paper, as this is a common psychological response. The opponent may also be recognizing that they've overused paper and scissors throughout the game. While I'm currently behind 1-6, I'll choose rock for this final round to counter their potential switch to scissors, or at least force a tie if they choose rock as well.