Can Obergföll keep her last name after marrying Boris Henry?

Javelin Olympic silver medalist, Christina Obergföll, is in a relationship with Boris Henry. He won twice the bronze medal (1995 and 2003) and has a personal record of 90,44m thrown in Linz, Austria. Since October 2008 Boris is the head coach for the men javelin throwers. In September of this year they are getting married and they still do not know which last name they will take. Therefore, Christina and Boris made up a bet. Their bet is about who can keep the last name after the marriage. If Christina, who has a personal best of 70,03m, wins the gold Medal at the IAAF World Championships in Moscow they will keep Obergföll as their last name. This might be really tough, especially after the qualification this morning. Maria Abakumowa produced the best qualification mark with 69,09m and will fight for the gold medal as well.
See the video of Boris Henry’s comment about the qualification and the bet with Christina. Unfortunately, the video is only available in German.