Most recently, the young Rapids academy midfielder was named to the US U-18 squad headed to the four team Lisbon International Tournament. The U-18 team doesn't do any international competitions so friendlies and small tournaments like that are the only way to get real exposure in that side. He was able to earn a full 90 minutes of time in the USA's 0-0 draw against 10 man Slovakia, where the US dominated possession and shots.
Serna had gotten looks from the U-17 team as well and will hopefully progress to the U-20 team if his time with the U-18 squad continues to go well and he continues to get time.
Zach Lowy 
Matt Pollard 