They have played just once before. That was in July last year in a hard court Challenger in America. Harrison won a very tight match in a third set tie break.
Dancevic had a 3 month break from the tour from March this year. He returned at the end of June for the grass tournament in Nottingham. He made it through the qualifying rounds beating Sam Groth in straight sets. He had some tricky opponents in the main draw and beat Alex Ward and Kukushkin in 3 sets. He was beaten in the third round in 2 close sets by Dolgopolov. He switched back to the the US for a Challenger last week and reached the quarter finals on hard courts.
It’s fair to say Harrison has struggled this year. His game is well suited to grass court tennis, or at least it is on paper. In reality he has a losing record on this surface and has won 3 of his last 10. He reached the quarter finals in the Challenger in Ilkley, England just before Wimbledon but then was beaten in the first round of qualifying.
The prices look about right and if anything the 1.87 on Dancevic looks tempting. We are unlikely to see many breaks of serve and their previous match had 2 tie breaks.
Backing the server is an option but I will be happier with my money on Dancevic.