 He was best known as the teacher of great violinists Yehudi Menuhin, Ruggiero Ricci, Isaac Stern, Stephan Hero, Camilla Wicks, Almita Vamos, Fredell Lack, Guila Bustabo, Arnold Eidus, Donald Erickson, Zvi Zeitlin, Leonard Posner, Enrique Danowicz and Louise Behrend.He was also Ricci's piano accompanist for many recitals and recordings, and Menuhin's for his first few recordings.Arthur Nikisch described him as ‘one of the most talented pupils the Leipzig Conservatory ever had’.