ESCAPE WP5 ESFRI Science Analysis Platform (ESAP)organised an ESFRI Use Case Requirements workshop (M5.1) on 16-17 April 2019 in Groningen, The Netherlands, in order to identify the requirements for the ESFRI Science Analysis Platform from ESCAPE ESFRI partners. Before the workshop, ESCAPE ESFRI partners were asked to fill in a survey form which was created by WP5. During the workshop, several discussion sessions were held to discuss identified ESAP components and the priorities of implementing each of the services. In this document, we analyse the answers of the ESFRI Survey in terms of data properties, computing system properties, and software properties. We also summarise the ESFRI use case requirements by identifying the required ESAP services and the priorities of implementing these services. Finally, we show a list of questions that have been raised during the workshop which need to be resolved in the future. Answers to the ESFRI Survey can be found in Appendix A.