The Nike looks like its Agassi...does it have a flaming tennis ball logo? It appears that it did. The adidas is ok.... Its not Lendl, and I dont think its from Stefan Edbergs line. The value of vintage tennis gear increases exponentially if it was part of pros gear line. If that Nike shirt is Agassi its a $100 plus shirt because it has value to Agassi fans,tennis gear collectors, and Nike collectors.