The general rule here is the main strings should be strung tighter than cross strings.Aug 17, 2019
How tight should tennis racquet strings be?
Typical tensions range from around 40-65lbs, but most players' tensions fall well within that range of extremes! Generally speaking, professional stringers tend to advise players to string their rackets as low as possible whilst still being able to maintain control of the ball.
How do you know if a tennis string is too loose?
https://www.youtube.com/watch?v=hpKnbNtWops
Do tighter strings give more spin?
Not necessarily. Because tighter strings produce less velocity, the ball will land shorter in the court. To make up for this, the player might swing harder generating more spin. In this case, it is not tighter strings that produce more spin, but the player's response to tighter strings.