Why did Loki had to come face to face combat with Thanos in Infinity War?

If you watched Thor Ragnarok, remember when he went into the vault and grabbed the Tesseract? It contained one of the infinity stones, and he kept it with him on the ship. Thanos seemed to be naturally drawn to the stones so he sought out Loki. (Or he had a way of finding them I’m not sure.) black canary costumes

He must of known who had it, (Thanos sent him to earth in The Avengers too so he knew Loki at least had it then.) and he used Thor to get to Loki, and unsurprisingly it worked. Their history went back a lot further than Infinity War however. They probably met at around the end of the first Thor movie. thea queen cosplay

So Loki ended up trying to kill Thanos directly to save Thor and the rest of the Asgardians. source:www.cosjj.com