what did Wawrinka pull off?
5-0 and 6-2 in a fourth-set tiebreak
who else pulled off a comeback?
Siemerink
at what event?
U.S. Open
what did mcenroe say he would do if Siemerink won?
Commentate on his head if
what flag did Wawrinka fly?
Swiss flag
did he win his match?
Yes
in what year?
2014
did mcenroe follow through on his promise?
Yes
who was wawrinka's quarterfinal opponent
Garcia-Lopez
who beat wawrinka?
Kei Nishikori