Tennys Sandgren 

Tennys Sandgren's mum was celebrating so hard after watching her son make the Australian Open quarter-finals that she cracked a rib and had to go to hospital. The unheralded American has been a revelation at Melbourne Park, upsetting former champion Stan Wawrinka in Round Two before sending fifth seed Dominic Thiem packing on Monday. His best ever Grand Slam run was all too much for his mum Lia who, in her excitement, crashed into a pool table, back home in Tennessee.