THEME:   first words of random two-word phrases relate to a sport and so can be interpreted as sports phrases   
GOOD ONES:     Ping-Pong player's etiquette?   TABLE-MANNERS      
BTW:   
ICI is not used in our language.      
Span that can't be shrunk   AGE-GAP [well, literally yes, but it does shrink as the generations age]      
Old speedster   SST [of course I fell into the trap thinking it was the REO Speedwagon]      
Producer of wall flowers   IVY [I doubt ivy produces flowers --- but maybe]      
Freud's I   [because it was Freud I fell into another trap: EGO instead of ICH]         
RATING:  
   Three grins = Loved it; Two grins = Enjoyed it; One grin = A bit bland for my taste; One teardrop = Not much fun