US Open star Jessica Pegula has opened up on why she prefers to travel by train than splash out on expensive cars. Pegula filmed herself grabbing the Metro to Flushing Meadows where the US Open is played every year. And fans have been loving watching the world No. 6 roughing it up on the subway when she could travel to the venue via any luxury vehicle she wants due to her immense wealth. Her father Terry is worth a whopping £5.1billion ($6.8billion) according to Forbes and owns NFL side Buffalo Bills alongside his wife Kim. He also is the owner of NHL outfit Buffalo Sabres, having made his mon…