Bernhard Langer and Corey Pavin share the lead at the halfway stage of the Senior Open Championship at Carnoustie.

Langer, the former European Ryder Cup captain, added a 71 to his opening 67 while Pavin, America's skipper at Celtic Manor in October, carded a second successive round of 69 to sit on four under par.

It could have been so much better for the German, who reached six under after an outward 34 but dropped shots at 13 and 16 saw him slip back into the pack.

"I could have putted a bit better," Langer said. "The ball did not drop for me like it did in the first round."

And it was similar story for the American, who picked up four birdies in the first 17 holes only to find water on the difficult 18th and record a double-bogey six.

With the wind getting up on Scottish links, anything below par represented a quality score and it came no better than Ian Woosnam's 67, which saw him vault into a tie for third just one shot back.

The Welshman, who led the successful European Ryder Cup team at the K-Club in Dublin four years ago, was joined by a trio of Americans on three under par for the championship - Jay Haas, Larry Mize and Dan Forsman.

Former Open champion Mark Calcavecchia is just two shots off the lead after a second round of 70.

However, there was disappointment for Sam Torrance, whose 77 included three sixes and was one of the worst rounds of the day.

Collated second-round scores (USA unless stated, par 71):

138 Bernhard Langer (Ger) 67 71, Corey Pavin 69 69

139 Dan Forsman 68 71, Ian Woosnam (Wal) 72 67, Jay Haas 70 69, Larry Mize 69 70

140 Mark Calcavecchia 70 70

141 Russ Cochran 70 71, John Cook 69 72, Jay Don Blake 67 74

142 David J Russell (Eng) 75 67, Olin Browne 70 72

143 Michael Allen 73 70, Jeff Sluman 69 74, Loren Roberts 71 72, Carl Mason (Eng) 67 76, Morris Hatalsky 71 72, Peter Senior (Aus) 71 72

144 Gary Hallberg 70 74, Bruce Vaughan 68 76, David Peoples 70 74, Domingo Hospital (Spa) 74 70, Fred Funk 75 69

145 James D Mason 71 74, Ted Schulz 75 70, Tom Watson 74 71, Trevor Dodds (Nam) 74 71

146 Tom Lehman 71 75, Mark James (Eng) 74 72, Ronnie Black 72 74, David Frost (Rsa) 71 75, Bill Longmuir (Sco) 75 71, Tommy Armour III 74 72, Sam Torrance (Sco) 69 77, Ross Drummond (Sco) 72 74, Fraser Mann (Sco) 72 74, Steve Cipa (Eng) 74 72

147 Gene Jones 73 74, Hideki Kase (Jpn) 77 70, Chris Williams (Rsa) 73 74, Scott Simpson 78 69, Stephen Bennett (Eng) 74 73, C.s. Lu (Tpe) 76 71, Eduardo Romero (Arg) 74 73, Barry Lane (Eng) 75 72

148 Juan Quiros (Spa) 76 72, Denis Watson (Zim) 76 72, Mike Donald 69 79, Mike Goodes 73 75, Wayne Grady (Aus) 77 71, Mike Cunning 74 74, Bob Cameron (Eng) 75 73, Angel Franco (Par) 73 75, Tsukasa Watanabe (Jpn) 74 74, Peter Fowler (Aus) 75 73, Glenn Ralph (Eng) 75 73, Randy Haag 71 77, Noel Ratcliffe (Aus) 76 72, Gordon J Brand (Eng) 73 75, Mark Belsham (Eng) 75 73, Mark Wiebe 68 80, Des Smyth (Irl) 74 74, Gordon Brand Jnr (Sco) 73 75

149 John Benda 74 75, Martin Poxon (Eng) 75 74, Bobby Clampett 76 73, John Harrison (Eng) 72 77, Bob Gilder 76 73, Boonchu Ruangkit (Tha) 75 74, Philip Blackmar 75 74, Denis O'Sullivan (Irl) 73 76, Tim Simpson 75 74, David Merriman (Aus) 74 75