Masters 2015: Record-breaking Jordan Spieth dominates at Augusta to lead by five shots

Jordan Spieth strengthened his grip at the top of the Masters leaderboard with a six-under second round of 66 to extend his advantage to five shots at Augusta.

The 21-year-old produced a record score of 130 after 36 holes to lead on fourteen-under heading into the weekend, with fellow-American Charlie Hoffman on nine-under and England's Justin Rose on seven-under.

Dustin Johnson and Paul Casey are level with the 2013 US Open champion going in the third round but the day belonged to Spieth, who continues to close in on his maiden major crown in sumptuous style.

"I pretty much made everything that was in a decent range today," the 2014 runner-up said. "All in all it was two very similar days - putting the ball well and taking my chances. I felt the swing felt natural today and I'll keep working on it.

"It will be somewhat challenging [not thinking about winning but I have to set a goal for myself. Charley Hoffman is playing solid golf so I certainly can't let up and the course will get tougher.

"I have been on my game and coming to a place that I love. It's special to be here and just be in the tournament let alone out front.

"I just need to keep my head down, set a goal for myself. It's definitely going to be more challenging and I am going to have to be aware of that and be okay with a bogey or two."

While Spieth could do no wrong, Rory McIlroy's hopes of clinching a career grand slam in Georgia were all but extinguished with an eventful second round of 71 which leaves him two-under for the tournament.

Tiger Woods' revival continued however with a three-under round of 69 which sees him inside the top 20 heading into the final two rounds.

Among the players who failed to reach the two-over cut line were American Jim Furyk, Padraig Harrington and Miguel Angel Jimenez but many of those staying for rounds three and four look likely to be playing second fiddle to Spieth.

Leaderboard: -14: Spieth, -9: Hoffman, -7: Rose, D. Johnson, Casey, -6: Mickelson, -5: Els, -4: K. Na, Streelman, Haas, Schwartzel