A near perfect first half display saw Tariq Lamptey have Chelsea two goal ahead at the break - his brace inside the first ten minutes complimented the performance as the Blues looked in control.
However Walsall found a way back into the game by means of a penalty kick following the restart, it gave the hosts the glimmer of hope they needed to start their comeback.
Wes McDonald fired fiercely into the net for the leveller before Dan Scarr took aim from distance and book his teams place in the last 16 of the competition.
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