Hi Peter,
Its not about believing more in either. Different sports need to be traded differently. In cricket, especially test cricket you can often have the same position for hours ( and even days) on end. If you get a good entry then you can stick with it. In tennis the market is much more volatile and you have to be monitoring it constantly.
I trade cricket when its available but tennis makes up 90% of my income. Cricket matches are more of a bonus.

what are your average netto profits in tennis and what in cricket trading monthly ?

“For tennis I very rarely put more than £500 into the market in one go but will top up if the situation merits it. Usually my stake is split into £200 to £300 chunks. I actually often use bigger stakes in cricket but will keep liability under £500 to £600.”