Complex sentence: In 2010, Radjenovic married Astrid Loch-Wilkinson, an Australian Olympian Bobsledder and have acted as a key mentor in improving her world ranking.
Split into simpler sentences: In 2010, Radjenovic married Astrid Loch-Wilkinson, an Australian Olympian Bobsledder. Radjenovic has acted as a key mentor in improving Loch-Wilkinson's world ranking.