Josep Borrell (L), the European Union's (EU) high representative for foreign affairs and security policy, speaks during a meeting with Greek Prime Minister Kyriakos Mitsotakis at the Prime Minister's Office in Athens, Greece, on June 24, 2020. Josep Borrell said that the EU was determined to protect its external borders during his visit to Greece on Wednesday. (Xinhua/Marios Lolos)

Greek Prime Minister Kyriakos Mitsotakis (L) greets Josep Borrell, the European Union's (EU) high representative for foreign affairs and security policy, at the Prime Minister's Office in Athens, Greece, on June 24, 2020. Josep Borrell said that the EU was determined to protect its external borders during his visit to Greece on Wednesday. (Xinhua/Marios Lolos)

Greek Prime Minister Kyriakos Mitsotakis (1st R) meets with Josep Borrell (2nd R), the European Union's (EU) high representative for foreign affairs and security policy, at the Prime Minister's Office in Athens, Greece, on June 24, 2020. Josep Borrell said that the EU was determined to protect its external borders during his visit to Greece on Wednesday. (Xinhua/Marios Lolos)

Greek Prime Minister Kyriakos Mitsotakis (L) meets with Josep Borrell, the European Union's (EU) high representative for foreign affairs and security policy, at the Prime Minister's Office in Athens, Greece, on June 24, 2020. Josep Borrell said that the EU was determined to protect its external borders during his visit to Greece on Wednesday. (Xinhua/Marios Lolos)