 Complete the following phrase:  Cahills 201617 season was a breakout year, where he appeared in many more main stage tournaments than any of his previous seasons. He appeared for the first time at both the 2016 Riga Masters, losing 34 to Zhao Xintong; and then 2016 World Open losing to Liang Wenbo 25. Cahill progressed to the third round of the 2016 Paul Hunter Classic by eliminating Kevin Vandevoort 40 and Ryan Day 42. In the third round, He drew world number one Mark Selby. Despite being 13 behind, he made two breaks above 50 to come back to tie the match at 33, but lost the deciding frame. The next event of the season saw him beaten 14 by Joe Swail in the second round of the 