Re: Tennis tipping #22c: Nottingham, come play in Robin Hoods forest!
You are right, it is still the rule
Top 30 players in the singles entry rankings can't play them, except during the Davis Cup and Grand Slam second weeks and when there are no ATP tournaments played. They are allowed to play challengers in these weeks as late entries (LE).
There are 5 top 30 players in Furth who have to be LEs