Tennis Tracker: Lehecka takes down Tiafoe in straight sets, Fritz ties it up for USA
Football Tracker: Chelsea stage comeback, Napoli and Atleti ease to wins
Alex De Minaur vows to 'make life difficult' for Belgian Davis Cup opponents
WTA roundup: Haddad Maia survives in Sao Paulo, Mertens & Kudermetova stunned in Mexico