Maria Sharapova is being investigated by police in India in a cheating and criminal conspiracy case involving a real estate company that used the tennis star to endorse a luxury housing project that never took off.
Former world number one Serena Williams has yet to make a decision about her participation at the Australian Open, while world number 12 Svetlana Kuznetsova is also a doubt for the first grand slam of 2018 after undergoing wrist surgery.
David Goffin was by far the best player of the Davis Cup final but his team mate Steve Darcis scolded himself for being "appalling" as Belgium missed out on a maiden title, suffering a 3-2 defeat to hosts France on Sunday.
Davis Cup champions andbeaten finalists since 1900:2017 France beat Belgium 3-22016 Argentina beat Croatia 3-22015 Britain beat Belgium 3-12014 Switzerland beat France 3-12013 Czech Republic beat Serbia 3-22012 Czech Republic beat Spain 3-2 2011 Spain
David Goffin never once lost his cool as he beat a nervy Jo-Wilfried Tsonga 7-6(5) 6-3 6-2 to put Belgium level at 2-2 with hosts France, sending the Davis Cup final into a decisive fifth match on Sunday.
David Goffin kept alive Belgium's hopes of winning its first Davis Cup title by beating Jo-Wilfried Tsonga of France 7-6 (5), 6-3, 6-2 in the first reverse singles match on Sunday to level the final at 2-2.