Would you see that 1.25 as a value bet or not?
What if a tennis player in Wimbledon or some other big tournament, quickly goes 40-0 and you have him @ 1.10 to win the game (not the match, just that 40-0 game) - can this be a value bet?
What about a basketball match, the total line is 180.5 and the game in live goes 150.5 - is it worth taking the "over" because the line has dropped 30 points below the original line?
How do you define value in general?
If it were in another sport maybe I would see it as a value bet but in tennis I don't see it as a value bet because there are only two players fighting against each other and the physical form here is the thing that matter the most beside the undisputed talent of course.
In such a delicate event anything can happen,like a damage to the ankle which is highly likely in a tennis game that is why I would not put a lot of money on this and I don't find it a value bet.I would find it a value bet if I was sure no physical damage will happen to Djokovic during the game,then surely this can be a value bet.
Live bets are always difficult to get that is why gambling houses have implemented them in a huge majority.I don't know about basketball,difficult also to predict.