Sometimes randomness can upset even the most skilled predictions. These were my odds for Biomes 1v1 in the previous Clan League:

I ended up winning 4 out of 6 games. But the probability of winning 4 or more was just ~0.00142, or about 1 in 704! I hope my incredible good fortune continues this year ;)
Calculation: Write p_1 = 0.08, p_2 = 0.10, ..., and p_6 = 0.17.
Then my chance of winning all games was p1 p2 ... p6 = 0.0000009792, about one in a million.
My chance of winning exactly 5 games was (1-p1) p2 ... p6 + p1 (1-p2) p3 ... p_6 + ..., a total of ~0.000058, or 1 in ~17295.
The chance of winning exactly 4 games was (1-p1) (1-p2) p3 ... p6 + ..., a total of ~0.0014, or 1 in ~734.