Both of these players have booming serves with a good return game to go along with it. You can do much harm with just a big serve on a indoors hardcourt but if you have a decent return game with it, that combo is deadly on this surface. In addition , both of these players serve and volley well which is also a good weapon indoors.
Giraldo and Nishikori won't stand a chance trying to grind it on the baseline all match long without a big serve....not against these two.
Take the Janowicz +Tsonga parlay....pays even money ......it's money in the bank.