Lemar and Herrera join Mario Hermoso, Joao Felix and Moussa Dembele on a list of five Atletico players currently out after contracting the illness. Atletico have been hit hard by the virus, with eight players previously having tested positive besides coach Diego Simeone.
Valencia were starting their pre-season preparations this week under new coach Javi Gracia, who was appointed two weeks ago following the sacking of Albert Celades in June.
Champions League: Atletico Madrid heave sigh of relief as remaining squad members test negative for COVID-19
Tests at the weekend had revealed two coronavirus cases at the club, which Atletico confirmed on Monday to be players Angel Correa and Sime Vrsaljko.
Serie A: Inter Milan beginning to play as a cohesive unit after summer recruitment, says manager Luciano Spalletti
Inter Milan manager Luciano Spalleti has stated that he feels like his team has just begun to work together as a cohesive unit, and that they are improving on a day-to-day basis.
FIFA World Cup 2018, semi-final preview: A look at what to expect in the Croatia vs England clash at Moscow
Croatia play England in the World Cup semi-final in Moscow on Wednesday. Here’s a look at what you can expect from the high-stakes match.
Croatia are appearing at the World Cup for the fifth time and have been drawn alongside two time former champions Argentina, Nigeria and Iceland in Group D.
FIFA World Cup 2018: Luka Modric, Mario Mandzukic leading names in Croatia's 32-man preliminary squad
Croatia are appearing at the World Cup for the fifth time and have been drawn alongside two time former champions Argentina, Nigeria and Iceland in a tricky Group D.
Europa League: Jack Wilshere says Arsenal still have belief despite first leg draw against Atletico Madrid
Despite the 1-1 draw in the first leg, Jack Wilshere said, "It was definitely not the result we wanted but the performance was good and we have got to take confidence from that and take that into the away fixture."
Europa League: Familiar frailties haunt Arsenal as Atletico Madrid's dogged resistance hands them advantage
Atletico Madrid fought their way back from adversity, exhibited great fortitude and pounced on Arsenal's weakness to take the upper hand in the semi-final tie.
Europa League: Antoine Griezmann's late equaliser gives Atletico Madrid the edge over Arsenal in semi-final tie
Arsenal's hopes of sending outgoing manager Arsene Wenger off with a trophy suffered a major blow as they could only draw 1-1 with 10-man Atletico Madrid in the first leg of their Europa League semi-final on Thursday.
As he hit the ground after the collision, Torres appeared to have lost consciousness. The incident left Atletico defender Jose Maria Gimenez in tears.