Guys if you have input wrong score, just go to section Challenges and then choose tab Completed and then simply update current score. 
Let me know if you need anything else. 

Hi Dima. I actually made a mistake on the input. We actually played 3 diff times and I thought I could put it all at once. My apologies.

I see. If you played 3 different matches (each match = one set), just do following: 
1. Go to this current challenge and update score to one set (for example, now score 5:7 6:1 6:3, and you can make it as: 5:7). 
2. After that, send two new challenges to Albert (he must accept them) and you both can update new result (6:1 one match and 6:3 another match). 
So in total there will be three matches of one set each.