![TOKYO, JAPAN - AUGUST 6: head coach Theodoros Vlachos of Greece, Ioannis Fountoulis of Greece during the Tokyo 2020 Olympic Waterpolo Tournament men's Semi Final match between Greece and Hungary at Tatsumi TOKYO, JAPAN - AUGUST 6: head coach Theodoros Vlachos of Greece, Ioannis Fountoulis of Greece during the Tokyo 2020 Olympic Waterpolo Tournament men's Semi Final match between Greece and Hungary at Tatsumi](https://c8.alamy.com/comp/2GC08KC/tokyo-japan-august-6-head-coach-theodoros-vlachos-of-greece-ioannis-fountoulis-of-greece-during-the-tokyo-2020-olympic-waterpolo-tournament-mens-semi-final-match-between-greece-and-hungary-at-tatsumi-waterpolo-centre-on-august-6-2021-in-tokyo-japan-photo-by-marcel-ter-balsorange-pictures-2GC08KC.jpg)
TOKYO, JAPAN - AUGUST 6: head coach Theodoros Vlachos of Greece, Ioannis Fountoulis of Greece during the Tokyo 2020 Olympic Waterpolo Tournament men's Semi Final match between Greece and Hungary at Tatsumi
![Ioannis VLACHOS | Research Scientist | PhD | Aristotle University of Thessaloniki, Thessaloníki | AUTH Ioannis VLACHOS | Research Scientist | PhD | Aristotle University of Thessaloniki, Thessaloníki | AUTH](https://i1.rgstatic.net/ii/profile.image/277777904357390-1443238821995_Q512/Ioannis-Vlachos.jpg)
Ioannis VLACHOS | Research Scientist | PhD | Aristotle University of Thessaloniki, Thessaloníki | AUTH
![Frank J. Slack, PhD on Twitter: Frank J. Slack, PhD on Twitter:](https://pbs.twimg.com/media/DGKqQVbXsAESBvB.jpg)
Frank J. Slack, PhD on Twitter: "With Ioannis Vlachos, speaking now in CLS 421 at BIDMC https://t.co/8Hrm9lFsAH" / Twitter
![Ioannis Vlachos Ioannis Vlachos](https://greekcitytimes.com/wp-content/uploads/2021/06/FB_IMG_1623912113573-1.jpg)