SEATTLE, WA - MARCH 08:  Goalkeeper Stefan Frei #24 of the Seattle Sounders FC reacts during the match against the New England Revolution at CenturyLink Field on March 8, 2015 in Seattle, Washington. The Sounders defeated the Revolution 3-0.  (Photo by Otto Greule Jr/Getty Images)

Who's Hot, Who's Not? Players Trending Up and Down for MLS Week 21

​After the MLS All-Stars lost 2-1 in a new version of the annual All-Star event, players and coaches need to revert their focus rather quickly due to the fact that the regular season will continue this weekend. With one game on Saturday and the rest on Sunday, teams are already preparing themselves to get a good result in MLS Week 21.

As has been the case every week, we'll analyze which players are coming on a hot streak as well as the ones who've been largely disappointing of late.

6. Who's Hot: Ignacio Piatti (Montreal Impact)

​Ignacio Piatti has been one of the best players in MLS this year, and several experts believe he needs to be considered as one of the top candidates in the MVP race at the end of the regular season. The 30-year-old Argentinian playmaker has been the best player for Montreal Impact of late, and he's scored three goals with two assists over the past four matches.

5. Who's Not: Chris Wondolowski (San Jose Earthquakes)

The USMNT attacker played on Thursday against Arsenal in the MLS All-Star Game, but failed to impress with an uninspriring shift on offense. He hasn't looked like the dangerous striker he was earlier this year. Even though he scored last week, Wondolowski hadn't notched a point on the scoresheet in the seven prior matches. He needs to play better, as he's a vital part of the San Jose Earthquakes attacking line.

4. Who's Hot: Sebastian Giovinco (Toronto FC)

Sebastian ​Giovinco was on a scoring drought that reached eight games, but the Italian forward broke out of the slump in style scoring a hat-trick against DC United last week. The Atomic Ant is known for being streaky, and he'll be one player to keep a close eye when TFC plays against the Columbus Crew this weekend.

3. Who's Not: Andre Blake (Philadelphia Union)

Even though Andre Blake impressed everyone during the 2016 Copa America Centenario playing for Jamaica, he hasn't been nearly as good for the Philadephia Union this year. The coveted goalkeeper conceded five goals last week against the Montreal Impact, and has allowed a total of 31 goals in only 20 appearances. The 25-year-old needs to play better if Philadelphia wants to keep themselves in the race for the Eastern Conference title.

2. Who's Hot: Sacha Kljestan (New York Red Bulls)

The New York Red Bulls' midfielder shows his quality week after week, but he left a great impression in the Hudson River Derby, scoring a goal and adding two assists during NYRB's 4-1 win over New York City in Yankee Stadium. The former Anderlecht player currently leads all MLS players with 12 assists in 21 matches, and he's arguably been one of the best attacking midfielders in the league this year.

1. Who's Not: Stefan Frei (Seattle Sounders)

It's not a secret that the Seattle Sounders have had plenty of problems on both sides of the ball. Stefan Frei, however, needs to be mentioned as someone who needs to step his game up pretty soon. The 30-year-old Swiss goalkeeper has allowed 25 goals in 19 matches, but what's even worse is that those 25 goals have come in only 52 shots; meaning nearly half of the shots against Seattle find the back of the net. Frei needs to be better if Seattle wants to improve their position in the Western Conference standings.