Fourth seed Cilic made light work of Donald Young with a 6-4 7-5 win, breaking at the end of each set, although he needed four match points to wrap up the victory, with Luxembourg's Muller up next for the confident Croatian. I was dreaming to play here.
"I can not believe that I've finally won this trophy", Lopez said.
"This week I was feeling really good on my serve and especially on the shots afterwards I was playing really well".
"It's hard to believe I'm playing my best tennis at 35, but yes I am", he said.
Seventh-ranked Cilic, the 2012 champion, played a near-perfect opening set.
Lopez performed miracles to scramble a point at 7-7 and serve for the match but Cilic responded with a nerveless volley after an exchange of blows from the baseline. Muller was under pressure on his serve for the first time in the match as he trailed 0-30, nonetheless, he found a way to hold onto his serve with some good serves.More news: Defiant Nancy Pelosi says she's not going anywhere
"I'm going to play semi-finals here for the first time tomorrow".
"Jordan is tough. I knew he was confident coming off that win against Andy", said Querrey, who faces Luxembourg's Gilles Muller for a place in the semi-finals. But it still contains two strong grass-court players who will be gaining plenty of confidence heading into Wimbledon, which starts on July 3.
"You can understand that it was something that I was working for my whole career, I mean I had to wait 16 years", he told reporters on Friday after dispatching Querrey 6-4 7-6 (5).
World number seven Cilic is chasing a second title this year, and 18th in total, following his success in Istanbul last month.
"I was playing some of the best tennis of the whole week", he added.
Dimitrov levelled things up after saving a break point early on in following set before taking Lopez's serve in the eighth game and then holding on to his serve.
In the third set, Dimitrov managed to fend off eight break points but still was broken twice as Lopez cruised to the finish line.
The two-time former quarterfinalist was comfortable at 40-15 but Muller became unstuck as the American created his first break point in the match on Muller's serve, which happened to be a set point with a sweet backhand return victor down the line.