Played a league doubles match today. My doubles partner served five double faults in one of his service games. How does this even happen? He missed overheads and volleys literally three or four feet from the net. Easy service returns and shots from the baseline going into the bottom of the net. I lost count at how many unforced errors he made. I tried to stay calm, remain positive and play my game but ultimately it had an affect on me. I missed a few shots and made some errors I don't usually make. We lost 4 and 5. What do you do in this situation?