Wave energy converters (WECs) can be expected to provide grid support services in future power systems. High levels of variable renewable energy (VRE), e.g., wind power, have posed many challenges in power system operation. The lessons learned through these challenges can anticipate future requirements for wave power integration. - Recent regulations have adopted more stringent requirements for VRE interconnection and developed new services for fast support. - In some networks, wind farms should provide grid support to ensure the security of supply, e.g., through frequency control and reactive power provision. - Such services were mainly provided by conventional synchronous generation in the past.