Boca suffered a humiliating 6-1 defeat to San Martin which leaves their Clausura hopes hanging by a thread.
“To all Boca supporters I say sorry for this defeat they don’t deserve,” Bianchi wrote in an open letter to Boca fans on Saturday.
“The team and I are ashamed at how we were beaten because this kind of result not only hurts but forces us to rethink many things. From now we’ll focus our efforts on the Libertadores Cup.”