England need four wickets to retain the Ashes
With only a miracle preventing England from winning the fourth Test and regaining the Ashes, the biggest betting opportunity is seemingly how large the winning margin will be against the Australians at Melbourne.
Australia finished the third day in the daunting position of 169/6 in their second innings, still 246 runs adrift with England still to bat again if required.
Tim Bresnan was the hero with the ball with 3-26, dismissing Shane Watson, Ricky Ponting and Mike Hussey in the space of five runs.
Betting odds are now 5/6 that Australia score a maximum of 188 runs and this is a possibility as England are in theory into the tail.
Other reasons why this is a possibility are that the remaining batsmen may take a purely attacking stance as they are unlikely to be able to defend for two days and Ryan Harris may not even come out to bat after limping from the field when bowling.
However, Brad Haddin and Mitchell Johnson will be responsible for attempting to manipulate any sort of fightback, with both having made reasonable scores already in the series.
Therefore, the 5/6 that Australia score a minimum of 189 could also prove tempting if both manage to get their arms loose and score some boundaries.
Furthermore, Peter Siddle has shown some resistance with the bat and it would not be a big surprise if he managed to make a double-figure contribution.
It is 5/4 that Haddin is the next Australian wicket to fall and given his natural attacking game, he could find himself caught in the deep.
Meanwhile, those wanting to take the more obvious option are offered 4/7 that Johnson is the seventh wicket to fall.
A £10 stake on the seventh Australian wicket to fall via lbw would return £55. New customers can sign up here for a free £10 bet.