I am confused from choosing of chelsea vs valencia or inter milano vs sparta prague which one guys!?
If you are confused to choose which one has a higher chance to win, then just forget to bet.

Betting is only for people who are confident to take a risk and smart enough to analyze the possibility.
If you ask me Inter are clear favorites against Sparta Prague but the Chelsea - Valencia match is a bit more tricky.
Agree. Inter Milan should be the favorite to win against Sparta as it has more world-class players. Moreover, Inter just got new strong strikers [Lukaku and Sánchez]. While for Chelsea vs Valencia, I think the chance is 50 : 50. We mustn't underestimate Valencia because Spanish club often bring surprises as an underdog.
It's probably Op first time in sport-betting... or he is not quite experienced in it lol. I doubt this forum is the the best place he'll get good & constant supply of answers to questions like that. I've seen people offer similar services here but they are best engaged on platforms like telegram.
So he could try searching & joining telegram groups or channels that specialize in such services. There he will get regular recommendations on teams to bet on.