Always better to BACK then LAY on Betfair as you generally get the best prices on betfair, so if you BACK you get the best price, but if you LAY then you get the worst price. Common sense is all it is...
If you price up a tennis player at 1.70 and you are able to back at 1.60, lay at 1.62, then the options are (a) no bet / look for value in the match elsewhere (UO games, set betting) (b) lay (c) 'take the price anyways' (d) take a punt on the overprice opponent.
As long as there people that take (c), then there is value in laying.
Personally view: try to stick to the options in (a).
Generalization doesn't support the approach.If you price up a tennis player at 1.70 and you are able to back at 1.60, lay at 1.62, then the options are (a) no bet / look for value in the match elsewhere (UO games, set betting)(b) lay (c) 'take the pr