Seyboth 100%?

The Brazilian has just given up as a challenger due to a back injury, a simple precautionary measure?

No idea if it's serious for Seyboth but I wouldn't even be surprised if it was an abandonment out of "laziness" to go to the end. Largely led as a challenger, he is not the mentally strongest guy on the circuit. Super tricky to have to analyze this match so either the guy sold out the match or he's really injured. Let's admit that he is 100% I think he has something to play in this match, the indoor conditions are not bad for Zhang but this ground is not super fast after all. If Seyboth manages to lock him into long rallies he can get out of it, I remind you that clay is not Zhang's best surface and that he is a little floating there in terms of results. Last year he reached the semi-final in this tournament by taking out two locals and a qualifier, not big names either, we stay on an ATP250. I like this Chinese but be careful not to overdo it.