Round 4 play (4pts):
Kevin Na to beat Zach Johnson +100 @ Paddy Power
With top-10 finishes in his last three starts and now inside the top-10 after 54 holes, Na is certainly a player in form and playing a great deal of confidence. Being eight shots off the lead, he does not have the pressure of being in contention early in the round, but if he does get a fast start, he is playing well enough to put some pressure on Walker. Johnson's form recently has not been as impressive - Na leads him 3-1-1 h2h in 2015 - and the last time that he was in a similar position (the Phoenix Open eight weeks ago), he shot 71 in rd4 to drop from 2nd to 10th. On form, Na should be the favourite in this matchup.