Bundesliga top scorer Robert Lewandowski’s brace saved Bayern Munich from a gigantic flop on Sunday as the Bavarians came back to beat bottom of the table Greuther Fürth 4-1 at the Allianz Arena. Bayern went nine points clear at the top, but second-placed Borussia Dortmund restored the six-point gap with a stunning 6-0 win over Borussia Mönchengladbach. Fürth surprisingly broke the deadlock after their top scorer Branimir Hrgota’s free-kick deflected in off Bayern midfielder Marcel Sabitzer shortly before the break. But the hosts kept it cool and didn’t waste time, scoring in the first minute …