David Law tames the Green Monster course to move into contention in Hamburg

Scotland’s David Law lies a shot off the halfway lead in the Porsche European Open (Richard Sellers/PA)

Scotland’s David Law produced a “pretty unbelievable” second round to lie a shot off the halfway lead in the Porsche European Open in Hamburg.

Law tamed a 7,455-yard course known as the Green Monster as he fired an eagle and eight birdies in a seven-under-par 66, a nine-shot improvement on his opening 75.