Tottenham will have to wait another year for FA Cup glory. They lost 2-1 to Leeds United.
A 58th minute goal by Clint Dempsey wasn't enough as they were beaten away at the Championship side. Luke Varney and Ross McCormack had earlier scored for Leeds.
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Officers were given the touching letter at Brixton Station while they were on a reassurance patrol after yesterday's attack
The 52-year-old had previous convictions for violence but was not on the anti-terror watchlist.
In a statement Charlton Athletic said: Keith was a true hero who will be greatly missed by all the Charlton family and everyone at the club.