Celebrated his 41st birthday on the day of The 149th Open’s first round and ended the weekend with his best finish in five visits, a share of 15th.
Made his debut in 2010 and is now back now off this season’s DP World Tour money list, having won the Hero Indian Open in February – his first victory on the circuit for nearly 8 ½ years - and then finished joint runner-up in June’s Porsche European Open in his home country.
There was also an eight-year gap between his maiden title at the 2004 Alfred Dunhill Championship in South Africa and the 2012 French Open, where he beat Francesco Molinari by one.
In between Siem partnered Bernhard Langer as Germany won the World Cup following a play-off with Scots Colin Montgomerie and Marc Warren, then added the 2013 Hassan Trophy and 2014 BMW Masters.
He reached a high of 48th in the world in 2013, represented his country in the 1998 and 2000 World Amateur Team Championship and also played for Europe against Asia in the 2012 Royal Trophy.