Split test reporting

Hi,

We set up split tests in our trigger emails a while ago and are now starting to get reports sent to our inboxes. One thing those reports doesn't contain though, is how many sends a particular email has gotten. We get info on the amount of opens, but is there a way to see the number of sent emails as well in this report? Or would it be possible to create a custom report in Marketo, showing the current results of our split tests including all relevant information such as sends and opens?

Thanks in advance.