Surely 5.0? Maybe extremely weak 5.0 and strong 4.5?
Their technique looks pretty bad for 5.0 and the serve looks like nothing special, not that fast nor well placed. The groundstrokes are the only shots that look good and really 5.0, from what ive seen from other 5.0 videos on youtube.
@nytennisaddict how do you reckon you would do against these guys?