Jankovic leads their head to heads 7-6. Their last match was in October 2015. Jankovic won in Hong Kong on a hard court in 2 sets.
Venus has better results this year. She reached the final of the Australian Open. Her only
match since then was a loss to Mladenovic at the end of January but that was straight after her final loss to Sister Serena in Melbourne.
Jankovic has been a little inconsistent. She has a decent recent record in Indian Wells. She reached the final in 2015 and 3rd round last year. If she was in top form she would not have struggled as much against Falconi in the last round.
Back Venus if she gets broken. This could be a great match
Update: Venus won in 3 sets. She was behind for most of the first 2 sets but took set 2 in a tie break and ran away with the third 6-1.