Semi-final spots have been decided at the ITF World Team Cup European Qualifier in Vilamoura ©Vilamoura Tennis Academy

All four men’s semi-final spots have been decided at the International Tennis Federation World Team Cup European Qualification tournament in Vilamoura.

Greece booked their spot in the last four with help from the highest ranked player in the competition, Stefanos Diamantis.

The world number 18 beat Anthony Dittmar 6-3, 6-2 to make the score 1-1 in their final group tie against Germany after Steffen Sommerfield won the opening singles rubber 6-0, 6-0 against Greek opponent Goirgios Lazaridis at Vilamoura Tennis Academy.

Despite losing so comfortably to Sommerfield, Lazaridis partnered Diamantis to a 6-2, 6-4 win in the deciding doubles tie to put Greece through.

Greece will face Italy in the last four after they eased past Croatia 3-0 in their own group.

Silviu Culea and Luca Arca won their singles ties 6-2, 6-0 and 6-1, 6-3 respectively, before Luca Spano teamed up with Culea to win the doubles 6-2, 6-3.

The other semi-final will see Slovakia face top seeds Austria after they beat hosts Portugal 3-0.

Austria advanced with a thumping 3-0 victory against Hungary, during which they lost just one game across the three rubbers.

Thomas Flax and Joseph Riegler ran out 6-0 6-1 winners over Attila Farkas and Laszlo Farkas in the doubles.

Martin Legner and Nico Langmann had earlier triumphed 6-0, 6-0 in their respective singles rubbers.

In the women’s event, Russia, Turkey, Denmark and Italy were already guaranteed the semi-final spots before the last two round robin matches took place.

Top seeds Russia secured first place in their group with a 3-0 whitewash win over Denmark.

Russia, winners of the 2016 European Qualification event, will go up against Turkey.

Italy, who beat Turkey 3-0 in their last group tie, will face Denmark for a spot in the final.

If Russia and Italy make it through their respective semi-finals, as is expected, they will set up their third meeting in a European Qualification final since 2014.

The eventual winners in Vilamoura will secure a place at the 2019 World Team Cup Finals in Israel, due to be held from May 13 to 18.