In a week of little action on the Billboard Latin 50 albums chart, Julio Iglesias enjoyed the biggest sales gain with Noche de Cuatro Lunes.

However, the Spanish singer's new album remained at #3, failing to budge either #1 Gloria Estefan's Alma Caribeña — Caribbean Soul or #2 Son by Four's eponymous sophomore album.

Iglesias, 56, called Noche a Cuatro Lunes "a 'new work' because, basically, it has influences of a younger generation: Alejandro Sanz and Estéfano," he told the news agency Europa Press. "They are artists who are very young and very important. And that new generation of musicians is noted on my album."

Noche de Cuatro Lunes includes Sanz's "Corazón Partío" (Broken Heart) (RealAudio excerpt), as well as two songs by cutting-edge Panama salsa singer/songwriter Rubén Blades, "Vida" (Life) and "Día a Día" (Day by Day) (RealAudio excerpt).

Son by Four's "A Puro Dolor" returns to the top of the Hot Latin Tracks chart, unseating this week's #2, "Muy Dentro de Mi (You Sang To Me)" by Marc Anthony, whose Desde un Principio — From the Beginning remains at #4 on the albums chart. Meanwhile, the English version of "A Puro Dolor," "Purest of Pain (Living Without You)," inches up to #32 from #35 on the Billboard Hot 100 pop singles chart.

The rest of the Latin 50 top 10 is: Omara Portuondo, Buena Vista Social Club Presents Omara Portuondo, at #5; Alejandro Fernández, Entre Tus Brazos, at #6; A. B. Quintanilla y los Kumbia Kings, Amor, Familia y Respeto..., at #7, after 68 weeks on the chart; Joan Sebastian, Secreto de Amor, at #8; Thalía, Arrasando, at #9; and Luis Fonsi, Eterno, which drops to #10 from #6.