Adam Scott has shot his way into a share of the second-round Masters lead alongside countryman Jason Day after a dramatic second round at Augusta National.

Scott threatened to run away with the 36-hole lead but settled for a four-under-par 68 to finish tied at the top at seven under, alongside fellow major winners Day (67), Brooks Koepka (71), Louis Oosthuizen (66) and Francesco Molinari (67).

Dustin Johnson (70), Justin Harding (69) and Xander Schauffele (65) finished a shot behind at six under alongside four-time Masters winner Tiger Woods (68).

Woods made an exhilarating back-nine charge highlighted by birdies at the par-4 11th, par-4 14th and par-5 15th.

It was not without drama as he suffered a bizarre accident when a security guard slipped on the soggy grass beside the 14th and tripped Woods.

Woods leaped in pain and limped for several metres before shaking it off.

Scott, the 2013 Masters winner, grabbed the outright lead on the par-5 15th hole when he returned from a 40-minute weather delay to fire his second shot from 231-yards to within four feet and knocked in the eagle putt.

The Queenslander missed a short par putt on the par-3 16th and birdie putts on 17 and 18 from within close range – eventually signing for a 68.

After his Thursday 69, it is the first time in 18 Masters appearances that Scott has recorded two opening rounds in the 60s.

Meanwhile, an injured Day captured much attention as he recorded his best opening two rounds at the Masters since 2013, when he handed Scott victory and the honour of wearing Augusta’s coveted green jacket.

Day is primed for another big Masters run but will have to battle a serious back injury over the next two rounds.

Rounding out the Australian contingent was Marc Leishman (72) and Cameron Smith (74) who both finished at even par.

The Masters still uses the rule that those within 10 shots of the lead advance to the weekend rounds, meaning the cut fell at three over.

Big names such as Justin Rose and Sergio Garcia (four over), former Masters winner Charl Schwartzel (five over) and Paul Casey (10 over) also missed the cut.

-AAP