Britain's Andy Murray faces four-time champion Roger Federer in the Australian Open quarter-finals today.
Tournament favourite Novak Djokovic's three-year reign as champion was ended yesterday when he was knocked out by the Swiss eighth seed Stanislas Wawrinka.
Murray's match is scheduled to begin at around 8.30am UK time.
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The man, in his thirties, was found with stab injuries on the upper deck of a bus in Handsworth, Birmingham, on Monday night.
Thousands of passengers now face delays, with Southeastern trains warning "all services" would be affected.
Paramedics attended a scene in Willesden, north-west London, on Monday afternoon where they found the teenager with stab wounds.